## Question

A gas expands against a variable external pressure given by **p = 10/V atm**, where **V **is the volume at each stage of expansion. in expanding from **10 L **to **100 L**, the gas undergoes a change in internal energy **Δ****U = 418 J**. How much heat has been absorbed?

**Joshi sir comment**

process is isothermal because pV = 10 = nRT

so work done W = 2.303nRTlog(V_{2}/V_{1})

so Q = **Δ****U **+ W

## Read 1 Solution.

This question is wrong. How does an isothermal process have change in INTERNAL energy ?

**ROHIT**8 year ago is this solution helpfull: 1 6