Chemistry Practice Problems Entropy Practice Problems Solution: The enthalpy of vaporization of ethanol is 38.7 kJ...

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# Solution: The enthalpy of vaporization of ethanol is 38.7 kJ/mol at its boiling point (78°C). Determine ΔSsys, ΔSsurr, and ΔSuniv when 1.00 mole of ethanol is vaporized at 78°C and 1.00 atm.

###### Problem

The enthalpy of vaporization of ethanol is 38.7 kJ/mol at its boiling point (78°C). Determine ΔSsys, ΔSsurr, and ΔSuniv when 1.00 mole of ethanol is vaporized at 78°C and 1.00 atm.

Entropy

Entropy

#### Q. Predict the sign of ΔS° and then calculate ΔS° for each of the following reactions.b. 2SO3 (g) → 2SO2 (g) + O2 (g)

Solved • Fri Nov 30 2018 17:50:16 GMT-0500 (EST)

Entropy

#### Q. For each of the following pairs, which substance has the greater value of S?b. N2O(g) (at 1 atm, 25°C) or He(g) (at 1 atm, 25°C)

Solved • Fri Nov 30 2018 17:46:04 GMT-0500 (EST)

Entropy

#### Q. Ethanethiol (C2H5SH; also called ethyl mercaptan) is commonly added to natural gas to provide the “rotten egg” smell of a gas leak. The boiling point ...

Solved • Fri Nov 30 2018 17:15:20 GMT-0500 (EST)

Entropy

#### Q. Calculate ΔSsurr for the following reactions at 25°C and 1 atm.a. C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)     ΔH° = -2221 kJ

Solved • Fri Nov 30 2018 17:02:51 GMT-0500 (EST)