When one mole of zinc and two moles of hydrochloric acid undergo the reaction Zn(s)+2HCI(aq) ---> ZNCI2 (aq)+H2 (g), 150.0 kJ of thermal energy are released at 25.00 C and 1.000 atm. The H2 gas generated does approximately 2.500 kJ of work on the surroundings as it expands. Calculate ΔE for the reaction (assume only P-V work is done). a. +103.3 kJ b. -145.5 kJ c. -147.5 kJ d. +152.5 kJ e. -152.5 kJ
When one mole of zinc and two moles of hydrochloric acid undergo the reaction Zn(s)+2HCI(aq) ---> ZNCI2 (aq)+H2 (g), 150.0 kJ of thermal energy are released at 25.00 C and 1.000 atm. The H2 gas generated does approximately 2.500 kJ of work on the surroundings as it expands. Calculate ΔE for the reaction (assume only P-V work is done). a. +103.3 kJ b. -145.5 kJ c. -147.5 kJ d. +152.5 kJ e. -152.5 kJ
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter17: Chemcial Thermodynamics
Section: Chapter Questions
Problem 17.46QE
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When one mole of zinc and two moles of hydrochloric acid undergo the reaction Zn(s)+2HCI(aq) ---> ZNCI2 (aq)+H2 (g), 150.0 kJ of thermal energy are released at 25.00 C and 1.000 atm. The H2 gas generated does approximately 2.500 kJ of work on the surroundings as it expands. Calculate ΔE for the reaction (assume only P-V work is done).
a. +103.3 kJ
b. -145.5 kJ
c. -147.5 kJ
d. +152.5 kJ
e. -152.5 kJ
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