Name ____________________________________________ Date _____________ Class ________
Molar Heat Capacity and Molar Enthalpy Change Practice
1. You need 70.2 J to raise the temperature of 34.0 g of ammonia, NH3(g), from
23.0°C to 24.0°C. Calculate the molar heat capacity of ammonia.
2. Calculate C for indium metal given that 1.0 mol absorbs 53J when it is heated
from 297.5K to 299.5K.
3. Calculate ΔH when 1.0 mol of nitrogen is heated from 233K to 475K.
4. What is the change in enthalpy when 11.0 g of liquid mercury is heated by 15°C?
5. Calculate ΔH when 1.0 mol argon is cooled from 475K to 233K.
6. What enthalpy change occurs when 112.0 g of barium chloride experiences a
change of temperature from 15°C to -30°C.
7. If the molar heat capacity and the temperature are known, why is the mass of a
substance not needed to calculate its molar enthalpy change?