A mole of nitrogen is compressed (by piling lots of sand on the piston) to a vol

Question

A mole of nitrogen is compressed (by piling lots of sand on the piston) to a volume of 7 liters at room temperature (293 K). The cylinder is placed on an electric heating element whose temperature is maintained at 293.001 K. A quasistatic expansion is carried out at constant temperature by very slowly removing grains of sand from the top of the piston, with the temperature of the gas staying constant at 293 K.

When the volume is 13 liters, how much energy transfer Q has gone from the heating element into the gas?

Explanation / Answer

You can use PV= nRT to solve for the change in temperature due to the removal of pressure. Then after you find what the change of temperature is without the heating element, find Q by using mc delta T

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