# URGENT chem help!

#1

a)Calculate the enthalpy change for the reaction.
b )Calculate the molar entropy change for the reaction.
Last edited by Kittymity; 3 months ago
0
#2
(Original post by Kittymity)

a)Calculate the enthalpy change for the reaction.
b )Calculate the molar entropy change for the reaction.
How do you do it as it doesn't give you the temperature
0
3 months ago
#3
(Original post by Kittymity)
How do you do it as it doesn't give you the temperature
What do you know about the superscripts on the S and the delta H?
0
3 months ago
#4
(Original post by Kittymity)

a)Calculate the enthalpy change for the reaction.
b )Calculate the molar entropy change for the reaction.
Draw yourself a reaction cycle, put in the numbers and make sure your arrows are in the right direction, then work out moles and divide the entropy by that
0
3 months ago
#5
(Original post by Kittymity)

a)Calculate the enthalpy change for the reaction.
b )Calculate the molar entropy change for the reaction.
is enthalpy change not just products-reactants, so u end up with -46x2= 92kjmol-1
and then use that same formula for the molar entropy, so (2x193)-((192)+(131x3))= -199kjmol-1
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#6
(Original post by p!nkpanther)
is enthalpy change not just products-reactants, so u end up with -46x2= 92kjmol-1
and then use that same formula for the molar entropy, so (2x193)-((192)+(131x3))= -199kjmol-1
Then why do u need the 92?
0
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