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A fixed amount of gas is heated by 1 degree C at constant volume, and its pressure increases by 1%. What must the initial temperature of the gas be?

1. 100 K
2. 100 deg C
3. 250 K
4. 250 deg C

Correct answer: 100 K

Solution

From Gay-Lussac's law, delta P / P = delta T / T. With delta T = 1 K and delta P / P = 1/100 = 0.01, T = 1 / 0.01 = 100 K.

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