An ideal gas at constant temperature and pressure expands and its

Options

(a) internal energy increases
(b) internal energy decreases
(c) internal energy remains same
(d) endropy increases and then decreases

Correct Answer:

internal energy remains same

Explanation:

Internal energy change (ΔE) is a function of temperature. So for constant temperature, ΔE is also zero i.e., internal energy remains same. [ΔE ∝ T]