The heat change at constant volume for the decomposition of silver (I) oxide is found to be `30.66 kJ`. The heat change at constant pressure will be

Options

A. `30.66 kJ`
B. `gt30.66 kJ`
C. `lt30.66 kJ`
D. Unpredicatable

Explanation

`Ag_(2)O(s) rarr 2Ag(s) +(1)/(2)O_(2)(g)`,
`(DeltaU)_(V) = 30.66 kJ`
We know that
`DeltaH = DeltaU + DeltanRT`,
`=30.66 +(3)/(2)xxR xx T ({:(Deltan=n_(P)-n_(R)),(=(5)/(2)-1=(3)/(2)):})`
`:. DeltaH gt DeltaU rArr (b)`