# Irreversibility of process wrt temperature - Thermodynamics

**Q. If temperature difference between two bodies in which heat transfer takes place increases, the irreversibility of the process***- Published on 20 Aug 15***a.** increases

**b.** decreases

**c.** does not change

**d.** approaches toward reversibility

**ANSWER: increases **

If the temperature difference between the two bodies approaches zero, the heat transfer process approaches irreversibility. In a reversible heat transfer process the temperature difference is infinitely small. But to transfer a finite amount of heat through an infinitesimal temperature difference, we need infinite time or infinite area. But this is not possible. Actual heat transfer process takes place through a finite temperature difference and these are irreversible. Therefore as temperature difference increases, the irreversibility also increases.