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Oct 6, 2019 at 11:00 comment added Dini by combining 3 equations $$3CO_2 + 4H_2O -> C_3H_8 + 5O_2 \Delta H = 2220 kJ$$ $$3C + 3O_2 => 3CO_2 \Delta H = 3(394) kJ$$ $$4H_2 = 2O_2 => 4H_2O \Delta H = 4(286) kJ$$ $$3C + 4H_2O = C_3H_8 \Delta H = 2220 + 3(394) + 4(286)$$ why i was wrong?
Nov 26, 2017 at 3:59 history edited andselisk CC BY-SA 3.0
added 26 characters in body
Oct 27, 2017 at 2:30 history answered Stardust CC BY-SA 3.0