Question

If heat is supplied to an ideal gas in an isothermal process,
(a) the internal energy of the gas will increase
(b) the gas will do positive work
(c) the gas will do negative work
(d) the said process is not possible.

Answer 1

Answer:

(c)

Explanation:

The ideal gas will expand and hence the work done would be negative .

Also, as the temperature is constant, internal energy does not change.

dU = Q + W

0 = Q + W

Q = -W

Answer 2

Answer:

d) this reaction is not possible

because in case of isothermal reaction heat is kept constant