# What amount of heat is imparted to a gas under a pressure of 200 kPa

What amount of heat is imparted to a gas under a pressure of 200 kPa, if its volume increased from 0.2 to 0.5 m3 during isothermal expansion?

Let us determine what the work will be equal to, if from the condition of the task we know that the volume of gas, which is under a pressure of 200 kPa, has increased from 0.2 m3 to 0.5 m3:

200 kPa – this will be the same as 200,000 Pa;

A = p * (V1 – V0);

A = 20,000 * (0.5 – 0.2) = 200,000 * 0.3 = 60,000.

As we know from the school physics course, in this type of process as isothermal, all the heat that is transferred to the gas will be directed to work, that is:

Q = A = 60,000.

Answer: Under such conditions, 60,000 J.

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