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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question
Which of the following would not be considered spontaneous?
Select one:
a.cooling a cup of coffee at room temperature
b.ice melting at room temperature
c.compression of gas to fill a tire
d.water flowing downhill
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- if the enthalpy change is negative and the entropy change is positive this reaction would be a) spontaneous at all temperatures b) spontaneous at high temperatures only c) nonspontaneous at all temperatures d) spontaneous at low temperatures onlyarrow_forwardAnswer number 11 to 16 pls. I don't want to waste my money here thanks.arrow_forwardWhich of the following is true ? X. Exothermic reactions are spontaneous because formation of products is favored by decrease of free energy of the system Y. All spontaneous reactions accompanied by increase of entropy of the universum. Z. All spontaneous reactions accompanied by increase of entropy of the system. * Y only * X, Y and Z * Y and Z only * X only * X and Z only * Z only * X and Y only * none of themarrow_forward
- C3H8 (g) + 502 (g) --> 3CO2 (g) + 4H2O (g) + 2200 k) Given the above equation, which statement is correct? A. can be spontaneous at all temperatures B. can be spontaneous at high temperatures O C. can be spontaneous at low temperatures D. can be spontaneous at no temperaturesarrow_forwardThe following reaction is endothermic. 2NH3(g) → N2(g) + 3H2(g) This means the reaction A. will be spontaneous at high temperatures. B. will be spontaneous at low temperatures. C. is not spontaneous at any temperature. D. is spontaneous at all temperatures.arrow_forwardAt 25 ?C the reaction from Part A has a composition as shown in the table below. Substance Pressure (atm) 3.75 C2H2(g) H2(g) C2H6(g) 5.25x10?2 What is the free energy change, ?G, in kilojoules for the reaction under these conditions? 4.75arrow_forward
- 28arrow_forward4. Select all that is considered spontaneous a. Cleaning your room b. A piece of bread molding after being left out in the sun c. A bomb exploding d. Pushing a ball up a ramp e. Ice melting f. Frying an egg g. Putting together a puzzlearrow_forwardchapter 12: 8) Calculate the free-energy change of the following reaction at 448°C and standard pressure. Values in the table are at standard pressure and 25°C. C2H4(g)+3O2(g)--->2CO2(g)+2H2O(g) ΔHºf,(kJ/mol) Sºf, J/mol•K ΔGºf, kJ/mol C2H4(g) 52.3 219.5 68.1 O2(g) 0 205.0 0 CO2(g) –393.5 213.6 –394.4 H2O(g) –241.8arrow_forward
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