Standard heat of formation at 25°C of CH4(g), CO2(g) and water (l) are 17.9 kcal/mole, –94.1 kcal/mole and –68.3 kcal/mole respectively. Calculate the heat change in the following reaction at 25°C (in k cal)
CH4(g) +2O2(g) = CO2(g) + 2H2O(l)
1
–144.5
2
–180.3
3
–248.6
4
–212.8