The enthalpy change for the reaction: A + 2B ? 3 C can be determined using the f

ID: 850546 • Letter: T

Question

The enthalpy change for the reaction:

A + 2B ? 3 C

can be determined using the following equations:

(1) 2 Z + C ? X ?H = 15 kJ

(2) 2 B + 3 X ? 3 Z ?H = 30 kJ

(3) 6 X ? A + 9 Z ?H = 20 kJ

Which of the folloing changes should be made to equation 1 in calculating the enthalpy change of the overall reaction?

The equation should be multiplied by a factor of 1/3.

The equation should be flipped an multiplied by a factor of 3.

No changes should be made.

The equation should be flipped.

The equation should be multiplied by a factor of 3.

The equation should be multiplied by a factor of 1/3.

The equation should be flipped an multiplied by a factor of 3.

No changes should be made.

The equation should be flipped.

The equation should be multiplied by a factor of 3.

The equation should be multiplied by a factor of 3.

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