P3 : Specific Heat Capacity

Question 1

What is specific heat capacity

Answer 1

The amount of energy required to raise the temperature of 1kg by 1*c

Question 2

Calculate the energy required to increase the temperature of 2kg of water from 20c to 100c
The specific heat capacity of water is 4200 J/kg*C

Answer 2

ΔE = m x c x ∆θ
ΔE = 2 x 4200 x 80 ΔE = 672 000J = 672kJ
ΔE = change in thermal energy
m = mass (kg) (2)
c = specific heat capacity (J/kgC) (4200)
∆θ = temperature change (C) (80)