Chemical Thermodynamics Question 485

Question: Consider the following reaction occuring in an automobile engine : $ 2C_8H_{18}(l)+25,O_2(g)\to 16,CO_2(g)+18,H_2O(g) $ of $ \Delta H,,\Delta S $ and $ \Delta G $ would be:

Options:

A) - + +

B) - - +

C) + + -

D) - + -

Show Answer

Answer:

Correct Answer: D

Solution:

  • It is a combustion reaction, $ \Delta H<0;,\Delta n_{g}>0,\Delta s>0 $ and therefore $ \Delta G<0 $


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