Chemical Thermodynamics Question 168
Question: Thermochemical reactions $ C(graphite)+\frac{1}{2}O_2(g)\to CO(g);,\Delta H=-110.5,kJ $
$ CO(g)+\frac{1}{2}O_2(g)\to CO_2(g);,\Delta H=-283.2,kJ $ From the above reaction, the heat of reaction for $ C(graphite)+O_2(g)\to CO_2(g) $ will be [CPMT 1988; MP PMT 1989]
Options:
A) - 393.7 kJ
B) + 393.7 kJ
C) - 172.7 kJ
D) + 172.7 kJ
Show Answer
Answer:
Correct Answer: A
Solution:
eq. (i ) + eq. (ii ) gives the required result.
