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URGENT chem help!

Kittymity

a)Calculate the enthalpy change for the reaction.
b )Calculate the molar entropy change for the reaction.

(edited 2 years ago)

chem.PNG25.7KB

Reply 1

Kittymity

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

Reply 2

BlueChicken

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?

Reply 3

CatInTheCorner

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 :smile:

Reply 4

p!nkpanther

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

Reply 5

Kittymity

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