Question

How many joules are required for heating 65g of water from 12 degree Celsius to 76 degree Celsius

Answer 1

The amount of energy required is 17 kJ.

The formula for the heat (q) is

q = mCΔT

m = 65 g; C = 4.184 J·°C⁻¹g⁻¹; ΔT = T_f – T_i = 76 °C – 12 °C = 64 °C

q = 65 g × 4.184 J·°C⁻¹g⁻¹ × 64 °C = 17 000 J = 17 kJ