Question

Calculate the ΔH of the following problems.

1. How many joules are required to raise the temperature of 450 mL of water from 30°C to 100°C?

2. The specific heat of copper metal is 0.385 J/g-°K. How many kJ of heat are needed to raise the temperature of 1.1 kg block of copper from 27.5°C to 50°C?

Answer 1

1. 25.2 kJ

2. 9.5 kJ