mastering Part A click the AH is an Extensive Property button within the activit

Question

mastering

Part A click the AH is an Extensive Property button within the activity, and analyze the relationship between the two reactions that are displayed. The reaction that was on the screen when you started and its derivative demonstrate that the change in enthalpy for a reaction, AH, is an extensive property. Using this property, calculate the change in enthalpy for Reaction 2 Reaction 1: C3H8 g 502 (g)- 3Co2 (g) +4H2O (g), AH1 2043 kJ Reaction 2: 5C3 H8 (g) 2502 (g)-15CO2 (g) +20H2O(g), AH2 Express your answer to four significant figures and include the appropriate units. CO reset shortcuts help AH 1.226.10 kJ Submit Hints My Answers Give Up Review Part Incorrect; Try Again; 5 attempts remaining

Explanation / Answer

1 ) The value of delta H changes as per the amount.

So, if the reaction is multiplied by 5, delta h for new reaction is:

5 * -2043 = -10215

2) For reverse reaction, delta H will change sign

Thus, for reverse reaction value of delta H = 92.3 kJ

3) solution would be:

E(1)R + E(2) + E(3) + 2*E(4)R

= 74.8 - 393.5 - 484.0 - 2(44)

= -890.7 kJ

Hope this helps

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