A vessel contains 64 g of oxygen and 16 g of hydrogen at STP. Chemical reaction is induced in the mixture by passing an electric spark till one of the gases is consumed completely. The temperature is

Question

A vessel contains 64 g of oxygen and 16 g of hydrogen at STP. Chemical reaction is induced in the mixture by passing an electric spark till one of the gases is consumed completely. The temperature is restored to the original value after reaction. The final pressure in the vessel

TestHub · Accepted Answer

2 H 2 ​ + O 2 ​ → 2 H 2 ​ O .16 g H 2 ​ = 8 mol consumes 4 mol O 2 ​ ; O 2 ​ present = 2 mol , so H 2 ​ is in excess. After reaction only 8 − 4 = 4 mol H 2 ​ remains (water condenses). Initial moles = 2 + 8 = 10 at 1 atm. P f ​ = 10 4 ​ × 1 = 0.4 atm .

Physics - Heat & Thermo Question with Solution | TestHub

Options:

Doubts & Discussion