Question

2. Consider the reaction: 2 BsHo (I)+ 12 O: (8) (a) Use the standard enthalpies of formation found in Appendix B of the textbook to calculate the enthalpy change of the reaction. The standard enthalpy of formation of BsH, () is 73.2 kl/mol. 5 B0, (s) + 9 HiO () s(-1272) 9-235.84)-273.2)-2(0) [-8932.56-146.47 40 78.46 (b) Predict the sign of the entropy change and provide the two reasons likely to have made the biggest impact on the entropy change (and upon which you based your prediction). (c) Based on your answer for (a) and your prediction for (b), do you expect the reaction to be spontaneous at all temperatures, at high temperatures only, at low temperatures only, or not spontaneous at any temperature? Briefly explain. Write the reaction equation for which the enthalpy change would be the enthalpy of formation of Fe(NO)s (s). 3. Given the following information, 4. 2 H2 (g)O (8) AH -483.6 kl/mol AH +284.6 kl/mol 2 H20 (g) 3 O (8) 2 0, (B) what is the AH for the reaction 3 H2 (g)+ Os (g)-3 H,O (g)?
Entropy/Enthalpy Questions

Answer 1

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