50.0 g of NH4Cl(s) (53.49 g mol–1) is dissolved in 200.0 mL of H2O in a constant–pressure calorimeter. The initial temperatures of both materials are the same at 20.0°C. The final temperature is 7.13°C. The density of water is 1.00 g cm–3. The specific heat of the solution is 4.184 J g–1 °C–1. What is the energy change of the solution?   –13.5 kJ   –14.4 kJ   +26.0 kJ What is the heat of the dissolution reaction?   +13.5 kJ mol–1   –13.5 kJ mol–1   +14.4 kJ mol–1

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50.0 g of NH4Cl(s) (53.49 g mol–1) is dissolved in 200.0 mL of H2O in a constant–pressure calorimeter. The initial temperatures of both materials are the same at 20.0°C. The final temperature is 7.13°C. The density of water is 1.00 g cm–3. The specific heat of the solution is 4.184 J g–1 °C–1.

What is the energy change of the solution?

 

–13.5 kJ

 

–14.4 kJ

 

+26.0 kJ

What is the heat of the dissolution reaction?

 

+13.5 kJ mol–1

 

–13.5 kJ mol–1

 

+14.4 kJ mol–1

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