Chemistry

1. How much heat in kilojoules is needed to bring 2.00 kg of water from 27.7 to 82.6 ¡ãC (comparable to making four cups of coffee)?

2. Consider the reaction:

CH4(g) + 2O2(g) ¡ú CO2(g) + 2H2O(g)
Use data in table below

Compound S¡ã, J¡¤mol-1¡¤K-1
CH4(g) 186.2
O2(g) 205.0
CO2(g) 213.6
H2O(g) 188.7

a. calculate ¦¤S¡ã in J¡¤K-1.
-----?-------J¡¤K-1

b. From the standpoint of entropy only this reaction

i) is not spontaneous.

ii) occurs spontaneously.

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