Question

2 HCl(aq) + Ba(OH)2(aq) --> BaCl2(aq) + 2 H2O(l) ?H= -118 kJ Calculate the heat when 124.8mL of 0.500M HCl is mixed with 300.0 mL of 0.540M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the final mixture has a mass of 424.8g and a specific heat capacity of 4.18 J/°C·g, calculate the final temperature of the mixture. Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10^5)

          2 HCl(aq) + Ba(OH)2(aq) --> BaCl2(aq) + 2 H2O(l) ?H= -118 kJ
Calculate the heat when 124.8mL of 0.500M HCl is mixed with 300.0 mL of 0.540M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the final mixture has a mass of 424.8g and a specific heat capacity of 4.18 J/°C·g, calculate the final temperature of the mixture.
Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10^5)

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2 HCl(aq) + Ba(OH)2(aq) –> BaCl2(aq) + 2 H2O(l) ?H= -118 kJ
Calculate the heat when 124.8mL of 0.500M HCl is mixed with 300.0 mL of 0.540M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0°C and that the final mixture has a mass of 424.8g and a specific heat capacity of 4.18 J/°C·g, calculate the final temperature of the mixture.
Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10^5)

Added by Alyssa C.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Hitendra Singh

11/03/2021

Step 1

The stoichiometry of the reaction is 2 moles of HCl for every 1 mole of Ba(OH)2. Moles of HCl = 0.500 M * 0.1248 L = 0.0624 moles Moles of Ba(OH)2 = 0.540 M * 0.300 L = 0.162 moles Since we need 2 moles of HCl for every mole of Ba(OH)2, and we have less than Show more…

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2 HCl(aq) + Ba(OH)2(aq) -> BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 124.8 mL of 0.500 M HCl is mixed with 300.0 mL of 0.540 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0 °C and that the final mixture has a mass of 424.8 g and a specific heat capacity of 4.18 J/°C·g, calculate the final temperature of the mixture.

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