Question

Which of the following is a correctly written thermochemical equation?
NH4Cl -> NH4+ + Cl-

2C8H18 + 25O2 -> 16CO2 + 18H2O, triangleH = -5,471 kJ/mol

Fe (s) + O2 (g) -> Fe2O3 (s), triangleH = -3,926 kJ

C3H8 (g) + 5O2 (g) -> 3CO2 (g) + 4H2O (l), triangleH = -2,220 kJ/mol

@Somy please I don't get this :(

Answer 1

http://en.wikipedia.org/wiki/Thermochemical_equation

Answer 2

check which reaction is balanced
and first option is ionic equation so its out

Answer 3

ok hold on

Answer 4

is it B?

Answer 5

it has to include the states at which reactants and products are

Answer 6

Im between B or D but I think B because it is exothermic change

Answer 7

both B and D are exo

Answer 8

and both are balanced

Answer 9

but only one of them includes the states in which reactants and products are

Answer 10

balanced?

Answer 11

@Somy

Answer 12

its D right? @Somy

Answer 13

yep

Answer 14

THANK YOU :D

Answer 15

no probs :)