Homework Help: HW Entropy Question

Posted by Nicole on Wednesday, May 4, 2011 at 5:51pm.

Sodium carbonate can be made by heating sodium bicarbonate:
2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)
Given that ΔH° = 128.9 kJ/mol and ΔG° = 33.1 kJ/mol at 25°C, above what minimum temperature will the reaction become spontaneous under standard state conditions? Answer in celsius

HW Entropy Question - bobpursley, Wednesday, May 4, 2011 at 6:05pm
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
HW Entropy Question - Nicole, Wednesday, May 4, 2011 at 9:27pm
I got 216.52

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