IB Chemistry 11 Energetics WS Name: _____________
Enthalpy Changes
1. It takes 78.2 J to raise the temperature of 45.6 g lead by 13.3°C. Calculate the specific heat capacity of lead.
2. How much heat energy is required to increase the temperature of 10.0 g of nickel (specific heat capacity of
440 J kg-1K-1) from 50.0 °C to 70.0 °C?
3. Copper has a specific heat capacity of 400 J kg-1K-1. If a 50 g cylinder of copper absorbs 800 J of energy,
by how much will its temperature rise?
4. The enthalpy of combustion of ethanol is 1370 kJ mol-1 . How much heat is released when 0.200 moles of
ethanol undergo complete combustion?
