Question

Reversible heating of perfect gas at constant p is not correctly explained by?

Answer 1

Answer:When a gas is heated at const vol., no external work is done and so the heat supplied is consumed only in increasing the internal energy of gas. But if the gas is heated at constant pressure, the gas expands against pressure so does some external work. In this case the heat supplied is used up in increasing the internal energy of gas and in doing some external work.

since the internal energy depends only on the temp., so for the same value of temp the internal energy of gas will increase by same amount whether the pressure and vol remains constant. But since ext. work is additionally done for cont. pressure process. So for same rise of temp. more amount of heat is supplied at const. pressure thats why specific heat at const. pressure is greater than specific heat at const

Explanation: