te the change in entropy that occurs in the system when 3.20 mol of diethyl ether (C4H100) melts at its melting point (- 116.3 °C). = 7.27 kJ/mol. s your answer in Joules per kelvin to three significant figures. Avallable Hint(s)

H+(aq) + OH-(aq) - - -> H2O (l) Use the table below to determine net ∆H for this reaction.

For each of the following processes, indicate whether the signs of ∆S and ∆H are expected to be positive, negative, or about zero. A piece of charcoal is combusted to form CO21g2 and H2O1g2

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Consider the two different systems, A and B, shown below.  If there are 3 particles with a total energy of 12 J, which system would have more entropy and why? Question 21 options:   System A has more entropy because it has greater separation between energy levels and hence more microstates than system B.   System B has more entropy because it has more than two microstates, whereas System A only has two microstates possible.   System A has more entropy because it has three microstates, whereas System B has less than three microstates possible.   System B has more entropy because it has more than three microstates, whereas System A only has three microstates possible.   System A has more entropy because it has more than one microstate, whereas System B only has one microstate possible.

What is the entropy change, in J mol-1 K-1, when 100.0 g of water boils at 100.0 oC?  (ΔHvaporization = 40.7 kJ/mol)  Type in your answer as a whole number with no units.

Consider the reaction: 2 H,0(g) → 2H,(g) + 0,(g) If 2.0 moles of H2O(g) are converted to H2(g) and 02(g) against a pressure of 1.0 atm at 125 °C, what is the change in internal energy for this reaction? R-8.314 1/mol K AH- 483.6 kl/mol

Under what temperature conditions (low T, high T, all T, nonspontaneous at all T) would this reaction occur spontaneously? Explain your reasoning. 2NH4NO3(s) → 2N2(g) + 4H2O(l) + O2 (g)  , ∆Horxn = -236.0 kJ

Calculate the entropy (in J/K) change when 866.7 g of liquid cyclohexane, C6H12, freezes at 6.47°C. The boiling point is 80.74°C, the melting point is 6.47°C, the enthalpy of vaporization is 32.0 kJ/mol, and the enthalpy of fusion is 2.68 kJ/mol for cyclohexane. Report your answer to 3 sig figs, but do NOT include units.

list any physical changes you can think of in which entropy increases (ΔS = +)