As ideal monoatomic gas of 1.5 moles is heated at a constant pressure 2 ~atm so that its temperature increases from 30^ C to 130^ C work done by the gas is (Universal gas constant .=8.3 ~J ~mol ⁻¹ ~K ⁻¹ )

Step-by-step solution

Work done by a gas in a constant pressure process is W=n R T ...(i) Here, n=1.5 moles aligned R & =8.3 ~J ~mole ⁻¹ ~K ⁻¹ T & = (130+273)-(30+273) =100 ~K aligned So,from eq. (i) W=1.5 8.3 100=1245 J