Determine the entropy change upon formation of the substance

Assignment Help Chemistry

Reference no: EM131026826

The following data compare the standard enthalpies and free energies of formation of some crystalline ionic substances and aqueous solutions of the substances:

Substance	ΔHf^o(kJ/mol)	ΔGf^o(kJ/mol)
AgNO3(s)	-124.4	-33.4
AgNO3(aq)	-101.7	-34.2
MgSO4(s)	-1283.7	-1169.6
MgSO4(aq)	-1374.8	-1198.4

(a) Write the formation reaction for AgNO3(s). Based on this reaction, do you expect the entropy of the system to increase or decrease upon the formation of AgNO3(s)?

(b) Use ?H°f and ?G°f of AgNO3(s) to determine the entropy change upon formation of the substance. Is your answer consistent with your reasoning in part (a)?

(d) For both AgNO3 and MgSO4, use the data to calculate the entropy change when the solid is dissolved in water. (e) Discuss the results from part (d) with reference to material presented in this chapter and in the "A Closer Look" box on page 540.

Reference no: EM131026826

Questions Cloud

Discusses macro-trends affecting future of us healthcare : Identifies and discusses the macro-trends affecting the future of the US healthcare system, including the overall economy, demographics, personal lifestyles and behaviors, technology and state government policies.

How does the process affect the entropy of the surroundings : Two different gases occupy the two bulbs shown here. Consider the process that occurs when the stopcock is opened, assuming the gases behave ideally. Draw the final (equilibrium) state. Predict the signs of ?H and ?S for the process.

Do you expect entropy of the system to increase or decrease : When most elastomeric polymers (e.g., a rubber band) are stretched, the molecules become more ordered, as illustrated here: Suppose you stretch a rubber band. Do you expect the entropy of the system to increase or decrease?

Who must win the battle and by what method : Where the scene of the conflict is - who the participants are and who must win the battle and by what method.

Determine the entropy change upon formation of the substance : Write the formation reaction for AgNO3(s). Based on this reaction, do you expect the entropy of the system to increase or decrease upon the formation of AgNO3(s)?

Justifying the firm survival : You should justify your choices in terms of the chosen industry/sector on the grounds of innovation, competitive advantage and, company's sustained growth and survival. Your budged is £150,000 (BP).

Test of independence the null hypothesis : In a x^2 test of independence the null hypothesis is that A)there is not an association B)there is an association

Find the p value for test statistic : Find the P value for Test statistic 30 for a right-tailed test. d.f. = 18 A)P value 0.05

Draw the lewis structure of the molecule : Using the data in the preceding table and in Appendix C, calculate ?H° and ?G° for the reaction in part (c). Is the reaction exothermic? Is it spontaneous at 298 K?

User Account

All Pages