Solution
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Step 1
Required:
Step 2
Write out given information in equation form.
Equation 1
(
= 233 kJ)
Equation 2
(
= 114.5 kJ)
Equation3
(
= 194.5 kJ)
Step 3
Rearrange
Equation 1
(Reverse)
(
= -233 kJ)
Equation 2
(Reverse)
(
= -114.5 kJ)
Equation3
(
1)
(
= 194.5 kJ)
(
= - 153 kJ)