Enthalpy of Reaction Answers
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1
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Which equation(s) do you need to reverse in order to calculate the overall equation for the formation of HCN and H2 from NH3 and CH4? Check all that apply.
A
N2(g) + 3H2(g) 2NH3(g)B
C(s) + 2H2(g) CH4(g)C
4H2(g) + 2C(s) + N2(g) 2HCN(g) + 3H2(g)2
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What must you do before adding the equations?
A
multiply the second equation by 2B
multiply the first equation by 1/3C
multiply the third equation by 1/23
Which equation shows how to calculate Hrxn for the equation below?
A
–802 kJ + 88 kJB
802 kJ + 88 kJC
–802 kJ – 88 kJDid you find these answers helpful?
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