Sodium carbonate can be made by heating sodium bicarbonate:

Question

2NaHCO3(s) �¨ Na2CO3(s) + CO2(g) + H2O(g)
Given that ƒ¢H�‹ = 128.9 kJ/mol and ƒ¢G�‹ = 33.1 kJ/mol at 25�‹C, above what minimum temperature will the reaction become spontaneous under standard state conditions? Answer in celsius

Answer 1

33.1kj/mol =128.9kj/mol-T(dS) Put in T (273+25) and find dS.

then,

0=128.9Kj/mol-T ds use your found dS, then solve for T. Convert to Celcius

Answer 2

I got 216.52