Question

The `K_(a)` for `CH_(3)COOH` at `300` and `310 K` are `1.8 xx 10^(-5)` and `1.805 xx 10^(-5)`, respectively. The enthalpy of deprotonation for acetic acid is `51.6 cal`.

Answer 1

Correct Answer - A
`2.303, "log" (K_(2))/(K_(1)) = (DeltaH)/(R) [(T_(2)-T_(1))/(T_(1)T_(2))]`
`2.303 "log" (1.805 xx 10^(-5))/(1.8 xx 10^(-5)) = (DeltaH)/(R) xx (10)/(300xx310)`
`Delta H = 51.6` cal.