Question

At `27^(@)C` one mole of an ideal gas is compressed isothermally and reversibly from a pressure of 2 atm to 10 atm. The value of `DeltaE` and q are (R=2 cal)
A. 0,-965.84 cal
B. `-965.84 cal,-865.58cal`
C. `+865.58cal,-865.58cal`
D. `+965.84cal,+865.58cal`

Answer 1

Correct Answer - A
Isothermally (at constant temperature) and reversible work.
`W=2.303" nRT log"(p_(2))/(p_(1))=2.303xx1xx300xx"log"(10)/(2)`
`=2.303xx600xxlog5=965.84`
At constant temperature, `DeltaE=0`
`DeltaE=q+W,q=-W=-965.84` cal