Question

When a 60 W electric heater is immersed in a gas for 100s in a constant volume container with adiabatic walls, the temperature of the gas rises by 5°C. The heat capacity of the given gas is_____J K^-1 (Nearest integer)

Answer 1

Correct answer is 1200

Power of heater = 60 W 

= 60 J/sec 

Total energy emitted 

= 60 × 100 = 6000 J

Heat capacity × temp difference = 6000

Heat capacity = 6000/5 = 1200JK^-1