Question

If 4.0kJ of energy is required to raise the temperature of 1.0kg of paraffin by 2.0°C, how much energy (in kJ) is required to raise the temperature of 5.0kg of paraffin by 1.0°C?

Answer 1

Answer:

10 KJ

Explanation:

We are told that 4.0kJ of energy is required to raise the temperature of 1.0kg of paraffin by 2.0°C.

Formula for heat energy here is;

Q = mcΔt

Where;

m is mass

c is specific heat capacity

ΔT is change in temperature

Thus;

4 = 1 × c × 2

c = 4/2

c = 2 Kj/Kg°C

The energy required to raise the temperature of 5.0kg of paraffin by 1.0°C would be;

Q_new = 5 × 2 × 1

Q_new = 10 KJ