Enthalpy of Reaction

Question 1

What is the equation for the overall reaction obtained by adding these equations?

Revolt · Accepted Answer

B:

Question 2

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.

Revolt · Accepted Answer

A: N2(g) + 3H2(g) 2NH3(g); B: C(s) + 2H2(g) CH4(g)

Question 3

What must you do before adding the equations?

Revolt · Accepted Answer

A: multiply the second equation by 2

Question 4

What is the overall reaction equation?

Revolt · Accepted Answer

C:

Question 5

What is the overall equation for the reaction that produces P4O10 from P4O6 and O2?

Revolt · Accepted Answer

B: p4O6(s) + 2O2(g) P4O10(s)

Question 6

Which equation shows how to calculate Hrxn for the equation below?

Revolt · Accepted Answer

C: –802 kJ – 88 kJ

Question 7

The enthalpy diagram to the right represents a set of thermochemical equations. Which set of equations could it represent?

Revolt · Accepted Answer

B: A + B C H1 = 800 kJC + D E + 2F H2 = - 200 kJF + D B H3 = - 300 kJ

Question 8

Select the true statement about the diagram.

Revolt · Accepted Answer

B: It represents one reaction.

Question 9

Select the true statement about the diagram.

Revolt · Accepted Answer

C: It can be used for a Hess's law calculation.

Enthalpy of Reaction Answers

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