# Multiple Answers Objective Type 3 mole of an ideal gas is filled in a  container fitted with a  movable frictionless piston. Now 11750 J heat is given to the gas and gas is taken by following process A to B. Then :. (A) gas is monoatomic (B) gas is diatomic (C) work done by gas from A to B 4250 J (D) pressure of gas will increase throughout the process

Sudheesh Singanamalla
114 Points
13 years ago

Dear Sanika ,

Whenever heat is applied to a closed system , there is a change in volume .

so PV = nRT at the initial phase will be the same for PV = nRT after heating it

let us take initial as P1V1 and final as P2V2

work done during an expansion is -PΔV ,

since P is also changing the above formula cannot be used and V changes , V increases when heated (because the piston moves up when it is heated)

so the final answer is (D) THE PRESSURE OF THE GAS WILL INCREASE THROUGHOUT THE PROCESS.

we cannot say that a gas is monoatomic or diatomic from the given information , so they have to be ignored .