Question

What amount of heat must be supplied to 2.0 × 10^–2 kg of nitrogen (at room temperature) to raise its temperature by 45 °C at constant pressure?

(Molecular mass of N² = 28; R = 8.3 J mol^–1 K^–1.)

Answer 1

Molar specific heat at constant pressure for nitrogen C_p = (7/2)R

= 7/2 x 8.3

= 29.05 J mol^-1 K^-1 

The total amount of heat to be supplied is given by the relation:

Therefore, the amount of heat to be supplied is 933.38 J.