What will be the work done in process CB for `1 mol` of an ideal gas if total `600` call heat is released by the gas in whole process.

Options

A. `400` cal
B. `600` cal
C. `800` cal
D. `1000` cal

Answer

C

Explanation

For cyclic process `du = 0`
`q = -w`
`pv_(1) = 1 xx R xx 300`
`pv_(2) = 1 xx R xx 400`
`:. p(v_(2) - v_(1)) = R(400 - 300)`
`q = -(w_(BA) + w_(AC) + w_(CB))`
`-600 = -[0 - 2 (400 -300) + w_(CB)]`
`w_(CB) = 800` cal.