Calculating Enthalpy and Entropy for H2+I2--> 2HI Reaction at 718 K

[Questions999]

Kp for the reaction H2+I2--> 2HI is 50.2 is 718 K. The ▲H (enthalpy) on standard conditions is 25 kJ mol^-1 .Use this information to find the enthropy of the reaction on 718 K...so I can findf free Gibbs energy from Kp,(in standard conditions) and therefore the standard enthropy..but how about enthropy in 718 K?

 

[Telemachus]

Could you show what you did? it will look nicer if you write it with latex :)