Chemistry 12 Worksheet 2-2 - Lechatelier'S Principle - Chemical Equilibrium Worksheet Page 7
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7Chemistry 12
Unit 2 - Chemical Equilibrium
19. On the basis of enthalpy and entropy, predict whether each of the following reactions
would be spontaneous as written or not at room temperature.
∆H = +67.7 kJ
a) N
+ 2O
2NO
2(g)
2(g)
2(g)
Minimum enthalpy favours (
) ..........
_________________________
reactants/products
Maximum entropy favours (
) ..........
_________________________
reactants/products
Spontaneous as written? (
) ..............
Answer __________________________
yes/no
b) 2C
+ O
2CO
+ 110 kJ
(s)
2(g)
(g)
Minimum enthalpy favours (
) ..........
_________________________
reactants/products
Maximum entropy favours (
) ..........
_________________________
reactants/products
Spontaneous as written? (
) ..............
Answer __________________________
yes/no
c) 2Pb(NO
)
+ 597 kJ
2PbO
+ 4NO
+ O
3
2(s)
(s)
2(g)
2(g)
Minimum enthalpy favours (
) ..........
_________________________
reactants/products
Maximum entropy favours (
) ..........
__________________________
reactants/products
Spontaneous as written? (
) ..............
Answer __________________________
yes/no
Worksheet 2-2 - LeChatelier's Principle
Page 7
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