1. Urea ((NH 2 ) 2 CO) can be formed from ammonia and carbon dioxide as shown in
ID: 923231 • Letter: 1
Question
1. Urea ((NH2)2CO) can be formed from ammonia and carbon dioxide as shown in the following reaction. H° value for this synthesis is -134.0 kJ, and S° is -424.0 J/K. Calculate the G°f for urea.
2NH3(g) + CO2(g) (NH2)2CO(s) + H2O(l)
2. The most important commercial process for generating hydrogen gas is the water-gas shift reaction:
CH4(g) + H2O(g) CO(g) + 3H2(g)
A. Use tabulated thermodynamic data to find G° for this reaction at the standard temperature of 25°C.
= 1.423×102 kJ
B. Now calculate G°1100 for this process when it occurs at 1100 K.
=?
Explanation / Answer
1. Urea ((NH 2 ) 2 CO) can be formed from ammonia and carbon dioxide as shown in
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