4,At constant pressure, the sign of q for the process C3H8(g) => C3H8(l) is____, because______ Group of answer choices A, positive, the process is exothermic B, no correct answer C, negative, the process is endothermic D, negative, the process is exothermic E, positive, the process is endothermic 5,If 9.00 mol of hydrogen gas completely reacted with 3.000 mol of nitrogen gas at constant pressure, releasing 277 kJ of heat, which of the following thermochemical equations is correct? Group of answer choices A, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +92.33 kJ B, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +831kJ C, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +277 kJ D, 3H2(g) + N2(g) => 2NH3(g); ΔH° = –92.3 kJ E, 3H2(g) + N2(g) => 2NH3(g); ΔH° = –277 kJ
4,At constant pressure, the sign of q for the process C3H8(g) => C3H8(l) is____, because______ Group of answer choices A, positive, the process is exothermic B, no correct answer C, negative, the process is endothermic D, negative, the process is exothermic E, positive, the process is endothermic 5,If 9.00 mol of hydrogen gas completely reacted with 3.000 mol of nitrogen gas at constant pressure, releasing 277 kJ of heat, which of the following thermochemical equations is correct? Group of answer choices A, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +92.33 kJ B, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +831kJ C, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +277 kJ D, 3H2(g) + N2(g) => 2NH3(g); ΔH° = –92.3 kJ E, 3H2(g) + N2(g) => 2NH3(g); ΔH° = –277 kJ
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter8: Thermochemistry
Section: Chapter Questions
Problem 31QAP: A student is asked to calculate the amount of heat involved in changing 10.0 g of liquid bromine at...
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4,At constant pressure, the sign of q for the process C3H8(g) => C3H8(l) is____, because______
Group of answer choices
A, positive, the process is exothermic
B, no correct answer
C, negative, the process is endothermic
D, negative, the process is exothermic
E, positive, the process is endothermic
5,If 9.00 mol of hydrogen gas completely reacted with 3.000 mol of nitrogen gas at constant pressure, releasing 277 kJ of heat, which of the following thermochemical equations is correct?
Group of answer choices
A, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +92.33 kJ
B, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +831kJ
C, 3H2(g) + N2(g) => 2NH3(g); ΔH° = +277 kJ
D, 3H2(g) + N2(g) => 2NH3(g); ΔH° = –92.3 kJ
E, 3H2(g) + N2(g) => 2NH3(g); ΔH° = –277 kJ
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