Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropyAS.Note: if you have not been given enough information to decide a sign, select the "unknown" option.reactionobservationsconclusionsΔΗ isACrystallization of a pure compound isspontaneous only below 125. °C.(pick one)As is(pick one)BThe reverse of this reaction is alwaysspontaneous but proceeds slower attemperatures below -30. °C.ΔΗ is(pick one)As is(pick one)ΔΗ is(pick one)This reaction is exothermic and proceedsCslower at temperatures below 139. °C.As is(pick one)⑤

To determine the signs of the reaction enthalpy (ΔH) and reaction entropy (ΔS) for each reaction…

Answered: Use the observations about each…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Mg(s) + 2HCI(aq) MgCl, (aq) + H2 (g) + 1550kJ For this reaction at 25°C, Change in enthalpy: [ Select ] O because [ Select] • Change in entropy: [ Select ] O because [ Select ] · Change in Gibbs free energy: [ Select] thus • This reaction is [ Select ]
The city of Lost Pizza is now approximately 2400 miles south of Alaska. It is slowly moving northward as the San Andreas fault slides along. If Lost Pizza is to arrive near Anchorage, Alaska, in 76 million years, at what average rate will it have to move in mm per month?
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction A B C observations This reaction is always spontaneous, but proceeds faster at temperatures below 140. °C. The reaction is never spontaneous. This reaction is spontaneous only above 129. °C but proceeds at a slower rate below 192. °C. AH is AS is conclusions AH is AS is AH is AS is X ✓ (pick one) positive negative unknown (pick one) î (pick one) (pick one) C Ś ↑ (pick one) î
Nn.78. Subject :- Chemistry
9) For which set of values of AH and AS will a reaction be non-spontaneous at 25°C? a) AH• = -10 kJ, AS = - 15 J b) AH• = - 10 kJ, AS= +5 J c) AH° = + 5 kJ, AS = +8J
Give typed full explanation
Consider the reactionCO(g) + Cl2(g)COCl2(g)Use the standard thermodynamic data in the tables linked above. Calculate G for this reaction at 298.15K if the pressure of COCl2(g) is reduced to 11.79 mm Hg, while the pressures of CO(g) and Cl2(g) remain at 1 atm.ANSWER: kJ/mol
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction A C observations This reaction is slower below 18. °C than above. This reaction is spontaneous only above 97. °C. This reaction is always spontaneous, but proceeds faster at temperatures above 72. °C. AH is AS is conclusions AH is AS is AH is AS is ✓ (pick one) positive negative unknown (pick one) (pick one) (pick one) (pick one)
Place the following substances in order of increasing voltality: CH4, CBr4,CH2Cl2,CH3Cl, CHBr3, CH2Br2
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy ▴ and reaction entropy as. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction A B C observations The reverse of this reaction is always spontaneous. This reaction is spontaneous except above 64. °C. This reaction is always spontaneous, but proceeds faster at temperatures below 77. °C. AH is AS is conclusions AH is AS is AH is AS is x (pick one) (pick one) (pick one) (pick one) (pick one) (pick one)
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions AH is A This reaction is always spontaneous, but proceeds slower at temperatures below 45. °C. AS is ΔΗ is This reaction is spontaneous only above 150. °C but proceeds at a faster rate above 180. °C. AS is ΔΗ is This reaction is exothermic and proceeds slower at temperatures below 67. °C. AS is X C (pick one) (pick one) (pick one) (pick one) ✓ (pick one) (pick one) Ś ?
Use the given data at 298 K to calculate AG°for the reaction CH4(g) + 2H2S(g) → CS2(g) + 4H2(g) Substance AHof (kJ/mol) S°(J/K·mol) O -50 kJ O 67 kJ O 184 kJ CH4(9) H2S(g) CS2(g) H2(g) -75 186 2.27 x 104 kJ -21 206 90 151 0 131

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