Question

Part A

What is

?

H

?

rxn

for the following chemical reaction?

C

S

2

(g)+2

H

2

O(l)?C

O

2

(g)+2

H

2

S(g)

You can use the following table of standard heats offormation

(?

H

?

f

)

to calculate the enthalpy of the given reaction.

Element/ Compound	Standard Heat of Formation (kJ/mol)	Element/ Compound	Standard Heat of Formation (kJ/mol)
H(g)	218	N(g)	473
H 2 (g)	0	O 2 (g)	0
H 2 O(l)	?285.8	O(g)	249
C S 2 (g)	116.7	H 2 S(g)	?20.60kJ
C(g)	71	C O 2 (g)	?393.5kJ
C(s)	0	HN O 3 (aq)	?206.6

Express the standard enthalpy of reaction to threesignificant figures and include the appropriate units.