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Match the following terms with its appropriate explanation [1 mark each]: able[[(1),Thermochemistry,a.,The total energy of a substance (H) 1. Match the following terms with its appropriate explanation [1 mark each]: 1 (2 3 (4 (5) Thermochemistry Heat Exothermic reaction Endothermic reaction Isolated System Enthalpy Calorimeter a. The total energy of a substance H b. Absorbs energy c. Amount of energy transferred between substances@ d. Study of the heat changes during chemical reaction e. Measures the energy absorbed or released f. Releases energy g. Step of chemical reaction that cannot be explained by simpler reactions h. A chemical that increases the reaction rate i. The enthalpy change for the conversion of reactants to products is the same whether the conversion occurs in one step or several steps j. The rate of chemical reaction at a single point in time k. the quantity of thermal energy required to raise the temperature of lg of a substance by 1C 1. The slowest step of reaction mechanism m. Enthalpy of formation of one mole of the substance from elements in their standard forms under standard condition n. A system in which energy can enter and leave,but matters cannot o. The energy of body or a system due to its position and composition p. Measure of average kinetic energy of particles in a substance -b Measurement of how fast reactants are used or products are made r. An ideal system that cannot exist in real life (7) (8) (9) Potential Energy Closed System 10 Temperature (11) Specific heat capacity 12 Hess's Law (13 Standard Enthalpy of formation (14 Reaction Rates (15) Rate-limiting step (16) Elementary Step (17) Instantaneous rate of reaction 18 Catalyst

          Match the following terms with its appropriate explanation [1 mark each]:
	able[[(1),Thermochemistry,a.,The total energy of a substance (H)
1. Match the following terms with its appropriate explanation [1 mark each]:
1 (2 3 (4 (5)
Thermochemistry Heat Exothermic reaction Endothermic reaction Isolated System Enthalpy Calorimeter
a. The total energy of a substance H b. Absorbs energy c. Amount of energy transferred between substances@ d. Study of the heat changes during chemical reaction e. Measures the energy absorbed or released f. Releases energy g. Step of chemical reaction that cannot be explained by simpler reactions h. A chemical that increases the reaction rate i. The enthalpy change for the conversion of reactants to products is the same whether the conversion occurs in one step or several steps j. The rate of chemical reaction at a single point in time k. the quantity of thermal energy required to raise the temperature of lg of a substance by 1C 1. The slowest step of reaction mechanism m. Enthalpy of formation of one mole of the substance from elements in their standard forms under standard condition n. A system in which energy can enter and leave,but matters cannot o. The energy of body or a system due to its position and composition p. Measure of average kinetic energy of particles in a substance -b Measurement of how fast reactants are used or products are made r. An ideal system that cannot exist in real life
(7)
(8) (9)
Potential Energy Closed System
10 Temperature (11) Specific heat capacity
12 Hess's Law (13 Standard Enthalpy of formation
(14 Reaction Rates
(15) Rate-limiting step
(16) Elementary Step
(17) Instantaneous rate of reaction
18 Catalyst
        
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match the following terms with its appropriate explanation 1 mark each table1thermochemistryathe total energy of a substance h 1 match the following terms with its appropriate explanation 1  37136

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Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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Match the following terms with its appropriate explanation [1 mark each]: able[[(1),Thermochemistry,a.,The total energy of a substance (H) 1. Match the following terms with its appropriate explanation [1 mark each]: 1 (2 3 (4 (5) Thermochemistry Heat Exothermic reaction Endothermic reaction Isolated System Enthalpy Calorimeter a. The total energy of a substance H b. Absorbs energy c. Amount of energy transferred between substances@ d. Study of the heat changes during chemical reaction e. Measures the energy absorbed or released f. Releases energy g. Step of chemical reaction that cannot be explained by simpler reactions h. A chemical that increases the reaction rate i. The enthalpy change for the conversion of reactants to products is the same whether the conversion occurs in one step or several steps j. The rate of chemical reaction at a single point in time k. the quantity of thermal energy required to raise the temperature of lg of a substance by 1C 1. The slowest step of reaction mechanism m. Enthalpy of formation of one mole of the substance from elements in their standard forms under standard condition n. A system in which energy can enter and leave,but matters cannot o. The energy of body or a system due to its position and composition p. Measure of average kinetic energy of particles in a substance -b Measurement of how fast reactants are used or products are made r. An ideal system that cannot exist in real life (7) (8) (9) Potential Energy Closed System 10 Temperature (11) Specific heat capacity 12 Hess's Law (13 Standard Enthalpy of formation (14 Reaction Rates (15) Rate-limiting step (16) Elementary Step (17) Instantaneous rate of reaction 18 Catalyst
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1-for-each-of-the-symbols-below-select-the-state-function-definition-g-free-energy-enthalpy-entropy-internal-energy-s-free-energy-enthalpy-entropy-internal-energy-h-free-energy-enthalpy-entr-68611

1. For each of the symbols below, select the state function definition: G (Free Energy, Enthalpy, Entropy, Internal Energy) S (Free Energy, Enthalpy, Entropy, Internal Energy) H (Free Energy, Enthalpy, Entropy, Internal Energy) U (Free Energy, Enthalpy, Entropy, Internal Energy) 2. A chemical reaction has just occurred in an isolated system which caused an overall increase in the potential energy of the system. Which statement below is true? Select one: a. The temperature of the system increased. b. The temperature of the system decreased. c. Heat was given off to the surroundings by the system. d. Heat was taken in from the surroundings by the system. 3. If a system does 45 J of work and receives 28 J of heat, what is the value of ΔU for this change? Select one: a. +17 J b. -73 J c. -17 J d. +73 J 4. From the options below, select the statement which best describes the concept of heat: Select one: a. Heat relates to a change in temperature. b. Heat relates to the flow of energy from a hotter object to a colder object. c. Heat relates to the flow of energy from a colder object to a hotter object. d. Heat is measured by the temperature of an object. 5. When a chemical reaction is measured to give off heat, it is said to be: Select one: a. Entropic b. Exothermic c. Enthalpic d. Endothermic 6. If the enthalpy of a chemical reaction has the value of ΔH = -100 kJ/mol, Select one: a. the temperature of the system and the surroundings both increase. b. the system liberates energy which is absorbed by the surroundings. c. the system absorbs energy from its surroundings. d. the temperature of the system and the surroundings both decrease. 7. An exothermic chemical reaction has just occurred in an isolated system. Which statement below is true? Select one: a. The potential energy of the system decreased. b. Heat was taken in from the surroundings by the system. c. The potential energy of the system increased. d. Heat was given off to the surroundings by the system. 8. A chemical reaction has just occurred in an isolated system which caused an overall increase in the potential energy of the system. Which statement below is true? Select one: a. Heat was given off to the surroundings by the system. b. The temperature of the system decreased. c. The temperature of the system increased. d. Heat was taken in from the surroundings by the system. 9. State functions are inter-related and knowing any two fixes the others. In contrast, path functions are observed only as consequences of a particular process of change. From the list of options below, select the list which ONLY lists variables which are considered to be 'state functions'. Select one: a. Gibbs Energy, Entropy, Enthalpy & heat b. Gibbs Energy, Entropy, Enthalpy & work c. Internal Energy, Entropy, Enthalpy & Gibbs Energy d. Temperature, Pressure, Volume, heat & work e. Internal Energy, Entropy, Enthalpy & work f. Internal Energy, Entropy, Enthalpy & heat

Suman K.

name-_________________________________________________________-date-_____________________-chemistry-2205-worksheet-energy-and-changes-in-matter-1-what-are-the-5-indicators-of-a-chemical-chan-48935

1. What are the 5 indicators of a chemical change? a. ______________________________________ b. ______________________________________ c. ______________________________________ d. ______________________________________ e. ______________________________________ 2. Classify the following changes as either physical or chemical a. Paint drying ______________________ b. Dissolving salt in water ______________________ c. Gasoline evaporating at the gas pump ______________________ d. Your car rusting ______________________ e. Chocolate chip cookies baking ______________________ f. Frost forming on your windows ______________________ g. Popcorn burning ______________________ 2. If a Kit Kat contains 11 grams of fat, 27 grams of carbohydrates and 2.7 grams of protein, how many Calories does it contain? (Show your work for full credit) 3. If a Krispy Kreme donut contains 12 grams of fat, 42 grams of carbohydrates and 3 grams of protein, how many Calories does it contain? (Show your work for full credit) 4. Forming bonds __________________________________ energy. 5. An endothermic reaction __________________________________ energy. 6. It takes 3620 calories to break the bonds for the chemicals in a reaction. 1501 calories are produced when the new compounds form. Calculate the energy of this reaction. (Show all your work for full credit) Is this reaction endothermic or exothermic? ____________________________ Will the reaction feel warmer or colder? _______________________________ 7. A chemical reaction produces 754 kJ of energy when the new bonds form. 935 kJ were absorbed in order to break the bonds in the reaction. Calculate the energy of the reaction. (Show your work for full credit) Is this reaction endothermic or exothermic? ____________________________ Will the reaction feel warmer or colder? _______________________________ 8. In a chemical reaction, three bonds need to be broken. The energy required to break those bonds are 104 Calories, 16 Calories, and 83 Calories. Two bonds are formed in the same reaction. One bond releases 2267 Calories when it’s formed, and the other releases 919 Calories when it’s formed. Calculate the energy of this reaction. (Show all your work for full credit) Is this reaction endothermic or exothermic? ____________________________ Will the reaction feel warmer or colder? _______________________________ 9. List three things that speed up chemical reactions: _______________________________ _______________________________ _______________________________

Sri K.

1when-strong-acids-and-strong-bases-are-mixed-salt-and-water-are-produced-and-the-reaction-is-highly-exothermic-for-example-h2so4aqcaoh2aq2-h2olcaso4aqheat-apredict-the-sign-of-the-temperatu-11618

When strong acids and strong bases are mixed, salt and water are produced, and the reaction is highly exothermic. For example: H2SO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + CaSO4(aq) + heat a. Predict the sign of the temperature change ΔT when HCl(aq) and Mg(OH)2(aq) are mixed. b. Write the full balanced equation for the chemical reaction between HCl and Mg(OH)2. c. Write the net ionic equation for this reaction. d. Does the net ionic equation you wrote in (c) explain why neutralization reactions between strong acids and strong bases are exothermic? Explain your choice based on the chemistry involved. e. The standard enthalpy of the balanced reaction you wrote in (b) is ΔH° = -103.9 kJ. Draw a potential energy diagram for this reaction, plotting Energy vs. Reaction progress. Indicate the enthalpy change ΔH°. f. If this reaction were run in a 1.0 L insulated container at 25.0 °C, what would the final temperature of the water be? (Remember that the specific heat capacity for water Cp = 4.184 J/g°C)

Adi S.


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Transcript

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00:01 Hello guys, so in this question we have to write each symbols below or we have to write the state function definition.
00:06 So the first one is g that is so this is free energy.
00:16 So the definition is it measure of chemical energy.
00:19 It is the measure of chemical energy.
00:27 Next symbol is s that is entropy.
00:33 So what is entropy? it is the measure of randomness of system.
00:38 Measure of randomness the system.
00:49 Next category is h that is equal to enthalpy.
00:56 So enthalpy is the total heat content, total heat content of a system.
01:08 And the last one is u that is equal to internal energy.
01:15 So it is equal to measure the, it is used to measure the energy within the system.
01:22 Energy within the system.
01:30 So this is the final value.
01:32 Next is question number two.
01:33 So we have to select one that the chemical reaction has just occurred in an isolation system which caused an overall increase in the potential energy.
01:40 So which statement is true for this? so the statement number, so the option number a is the correct answer.
01:51 Option a and it says that the temperature of system is increased.
01:56 The temperature is increased.
01:57 Now the third question is given that if a system does 45 joules of work, so we have given work that is 45 joules and it receives 20.
02:07 8 joules of heat so what is the value of delta u for this change so heat received is 28 joules and we have this formula that says u is equal to q thus w so we just put in the values in it so it is 28 for q plus 45 is the work so it is equal to so as the work is done by the system it will be equal to plus of minus 45 jules so here it will be equal to minus of 17 joules.
02:47 So from this our option number c is the correct answer.
02:54 So next question is from the options below we have to select the statement which best describes the concept of heat.
03:00 So for this the correct option is option number b.
03:06 Option b is the correct answer for the fourth question and it says heat relates to the flow of energy...
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