Question

What is ΔH∘rxn for the following chemical reaction?
CS2(g)+2H2O(l)→CO2(g)+2H2S(g)

Answer 1

C + 2S -> CS2 116.7kj
2H2 + O2 -> 2H2O -285.8kj
C + O2 -> CO2 -393.5kj
H2 + S -> H2S -20.6kj

i got -265.6kj but its wrong i dont know which part i did wrong please help

-(116.7)+(285.8)+(-393.5)+(-20.6*2)=-265.6 kj

Answer 2

the \(\Delta H_{rxn}\) is always products - reactants, so you need to swap the order

Answer 3

the setup should be: \[\Delta H_{rxn} = \left[\Delta H(CO_2) + 2\Delta H(H_2S)\right] - \left[\Delta H(CS_2) + 2\Delta H(H_2O)\right]\]

Answer 4

ty