Question

The standard enthalpy of combustion of solid urea (co(nh2)2) is 632 kj mol1 at 298 k and its standard molar entropy is 104.60 j k1 mol1. Calculate the standard gibbs energy of formation of urea at 298

Answer 1

Delta G equals Delta H (enthalpy) - T(temp)*delta S (entropy)

You have to convert enthalpy to j from kj then subtract temperature times entropy from that

It is going to be negative.