Question

The work done by 100 calorie of heat in isothermal expansion of ideal gas is

Answer 1

One calorie is equivalent to 4.184 joules or J = 4.18 J/cal.

Work done(W) = 4.18 * 500 = 2090J


As 1calorie is equal to 4.184 calorie then 100 calorie is equal to 4.184×100 =418.4 okkkkkkk

Answer 2

For an isothermal expansion of an ideal gas, the change in internal energy is zero.

According to the first law of thermodynamics,

Change in internal energy U = Q-W = 0

So, all the heat energy is utilized to do work.

Q = W

We know that, one calorie is equal to 4.184 J

Therefore, Work done by 100 calorie of heat in an isothermal expansion of any ideal gas will be 4.184 * 100 =  418.4 Joule

Hope it helps.