A thermally insulated rigid container holds 6 mol of an ideal diatomic gas at 400 K. Heat is supplied so that 3 mol dissociate into atoms while the temperature stays at 400 K. Find the heat supplied i

Question

A thermally insulated rigid container holds 6 mol of an ideal diatomic gas at 400 K. Heat is supplied so that 3 mol dissociate into atoms while the temperature stays at 400 K. Find the heat supplied in joules (nearest integer, ignoring bond energy).

TestHub · Accepted Answer

Before: U = 6 × 2 5 ​ RT = 15 RT . After: 3 mol diatomic and 6 mol atoms, U = 3 × 2 5 ​ RT + 6 × 2 3 ​ RT = 16.5 RT . W = 0 , so Q = Δ U = 1.5 RT = 4988 J.

Physics - Heat & Thermo Question with Solution | TestHub

Doubts & Discussion