Question

For a reaction, P + Q $\rightarrow$ R + S. The value of $\Delta H^{o}$is $- 30kJmol^{- 1}and\Delta Sis - 100JK^{- 1}mol^{- 1}$ At what temperature the reaction will be at equilibrium?

• A. $27^{o}C$
• B. $52^{o}C$
• C. $30^{o}C$
• D. $45^{o}C$

Answer 1

Answer: (A)

$27^{o}C$

Answer 2

: $\Delta G = \Delta H - T\Delta S,$

At equilibrium, $\Delta G = 0,\Delta H = T\Delta S$

30000 = T ×100

T = 300 K or $27^{o}C$