Questions asked
As the temperature of a reaction is increased, the rate of the reaction increases because the activation energy is increased. reactant molecules collide with greater frequency and greater energy per collision activation energy is decreased. reactant molecules collide less frequently.
Energy Energy Reaction progress Reaction progress Which of the following is correct with respect to these diagrams? B 27
A reaction does favor formation of products at room temperature and also favors formation of products at a much higher temperature signs of $\Delta H^°$ and $\Delta S^°$, assuming that the enthalpy and entropy changes are not greatly affected by the temperature change? (Select all that apply.) $\Delta H^°$ must be positive $\Delta S^°$ must be negative $\Delta S^°$ must be positive $\Delta H^°$ must be negative
A 50kg acrobat is launched from rest into the air by a compressed d = 0.25m springboard with a force constant of 8000 N/m. Neglect air resistance. Show all work on reverse of this page. a) What is the potential energy of the compressed springboard? b) What height h above the springboard (at equilibrium) does she achieve?
Find an equation of the tangent line to the curve at the given point. y = sin(sin(x)), (2𝜋, 0)
9. Let U = \{u, v, w, x, y, z, 1, 2, 3\}, E = \{2, y, w, z\}, F = \{2, 3, u, y, z\}, and G = \{1, 2, 3, w, y\}. List the elements in each of the following sets. (a) E' (b) F \cup G' (c) (E \cup F) \cap G'
The rate of interest charged to commercial banks by the Fed for loans is called the ____ rate. federal funds discount prime commercial paper
Problem 18 The pressure of a 2-L rigid container with a valve is 160 kPa. Initially, one-half of the volume is filled with saturated liquid R134a and the other half with saturated R134a vapor. Now, heat is transferred to the R134a while maintaining a constant temperature by opening the valve. It is desired that the container not run out of liquid R134a for 10 min. Determine: (a) the initial mass of the R134a in the container (5) (b) the final mass of the R134a in the container (5) (c) the highest rate of heat transfer allowed (10) Problem 19 Liquid water at 100 kPa and 20°C enters an adiabatic pump at a rate of 6 kg/min and is isothermally compressed to 1 MPa. The compressed water is heated to superheated water at 400°C by hot air in an adiabatic heat exchanger. The air enters the heat exchanger at 2000 K and leaves at 1000 K. The steam then flows steadily through an adiabatic turbine. The exit conditions of the turbine are 30 kPa and 90 percent quality. (Air properties: R=0.287 kJ/kgK, cv=0.713 kJ/kgK) Determine: (a) the power input of the pump (can be calculated using Δh=vΔP) (5) (b) the mass flow rate of air in the heat exchanger (10) (c) the power output of the turbine (10) (d) Show the process of the water between the inlet of the heat exchanger and the outlet of the turbine on a T-v diagram including saturated temperature (10)
7 ! Required information Patricia has a weight of 131 lb. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Print What is her mass in kilograms? (Use $g = 9.81 \text{ m/s}^2$) Patricia's mass is kg. References
A nurse is collecting data from a client who has heart failure and is taking furosemide. Which of the following findings should indicate to the nurse that the medication is effective? a. Decreased BUN level b. Decreased hemoglobin level c. Increased weight of 0.91 kg (2 lb) d. Increased urinary output
