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: 1200
Solution: The heat capacity of the gas can be calculated using the formula:

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Given data:

  • Power of the heater = 60 W (or 60 J/s)
  • Time the heater is on = 100 s
  • Temperature rise of the gas = 5°C

Now, let’s calculate the total energy emitted:
Total energy emitted = Power × Time
Total energy emitted = 60 J/s × 100 s = 6000 J

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