Question

An ice slab kept at atmospheric pressure at 0oc starts melting then what is the nature of work. A skipped positive b negative c no work done d data not sufficient

Answer 1

Explanation:

In melting Ice to water , heat Q is supplied by air $$[Q > 0]$$

Ice is less dense than water , so when ice melts, its intermolecular distances decreases resulting in lowering of internal energy [ Δu < 0]

Thus, as W=Q−Δu, from above , ⇒ work done by air is positive.