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Calculating Entropy Changes in the Surroundings
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Chapter 19 Slide 36 Example Calculation
Consider the combustion of propane gas:
C3H8(g) + 5 O2(g) produces 3 CO2(g) + 4 H2O(g) ΔHrxn = –2044 kJ
a. Calculate the entropy change in the surroundings when this reaction occurs at 25 °C.
b. Determine the sign of the entropy change for the system.
c. Determine the sign of the entropy change for the universe. Is the reaction spontaneous?
Consider the combustion of propane gas:
C3H8(g) + 5 O2(g) produces 3 CO2(g) + 4 H2O(g) ΔHrxn = –2044 kJ
a. Calculate the entropy change in the surroundings when this reaction occurs at 25 °C.
b. Determine the sign of the entropy change for the system.
c. Determine the sign of the entropy change for the universe. Is the reaction spontaneous?
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