16.What is the work performed by a gas if it expands from 3.44 L to 6.19 L against aconstant external pressure of 1.26 atm? Express the final answer in joules. (W=P x dV)17.Calculate the heat involved when 25.0 g of Fe increase temperature from 22° C to 76°C.The specific heat of Fe is 0.449 J/g• °c. (Q = ms(t2-t¡)18.Nitrogen gas reacts with oxygen gas to make NO(g) while absorbing 180 W. Is thisprocess exothermic or endothermic?19.Given the thermochemical equation: N2(g) + 3H2(g) + 2NH3(g) AH =-91.8kJHow much heat is given off when 1.00 g ofH2 reacts?20.What is the work when 2,345 mL of gas contract to 887 ml- under an external pressure of348 torr? (1 mmHg = 1 torr) (W = P x dV)

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16.What is the work performed by a gas if it expands from 3.44 L to 6.19 L against a constant external pressure of 1.26 atm? Express the final answer in joules. (W=P x dV)

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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Question

16.What is the work performed by a gas if it expands from 3.44 L to 6.19 L against a
constant external pressure of 1.26 atm? Express the final answer in joules. (W=P x dV)
17.Calculate the heat involved when 25.0 g of Fe increase temperature from 22° C to 76°C.
The specific heat of Fe is 0.449 J/g• °c. (Q = ms(t2-t¡)
18.Nitrogen gas reacts with oxygen gas to make NO(g) while absorbing 180 W. Is this
process exothermic or endothermic?
19.Given the thermochemical equation: N2(g) + 3H2(g) + 2NH3(g) AH =-91.8kJ
How much heat is given off when 1.00 g ofH2 reacts?
20.What is the work when 2,345 mL of gas contract to 887 ml- under an external pressure of
348 torr? (1 mmHg = 1 torr) (W = P x dV)

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