Thermal 2

How do you measure the specific heat capacity of a gas?

One mole of Argon gas (molecular weight 40) is placed in a cylinder with a freely moving piston. The piston is fixed keeping the volume constant and 620 J of heat are added raising the temperature from 300 K to 350 K.

Determine the specific heat capacity of Argon at this volume.

Sometimes it's good to plan by working backwards. Fill in the missing words in the plan below using the draggable boxes.

Q C = Q/ΔT c = Q/mΔT volume kg ΔT mass mole

The question asks for the specific heat capacity which is defined by the equation . We are given , the heat added and can work out the change in temperature but are not given the . However we can find the from the fact that there is 1 .

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