Consider the following reactions:W(s) + C(graphite) ---> WC(s)What is the enthalpy of reaction (in units of kJ) of the reaction above?2W(s) + 302lg) --->C(graphite) + O2(g)2WC(s) + 502(g) ---> 2WO3(s) + 2CO2(g);AH = -1685.8 kJ2WO3(s);---> CO2(g);AH = -393.5 kJ%3DΔΗ--239 1.8 kJ

Interpretation- To determine the enthalpy of the reaction ( in KJ) which is given as W(s) +…

Consider the following reactions: W(s) + C(graphite) ---> WC(s) What is the enthalpy of reaction (in units of kJ) of the reaction above? 2W(s) + 302(g) ---> 2WO3(s); C(graphite) + O2(g) 2WC(s) + 502(g) ---> 2WO3(s) + 2CO2(g); AH = – 1685.8 kJ %3D CO2(3); ΔΗ--393.5 kJ ---> ΔΗ--2391.8 kJ

Consider the following reactions: W(s) + C(graphite) ---> WC(s) What is the enthalpy of reaction (in units of kJ) of the reaction above? 2W(s) + 302(g) ---> 2WO3(s); C(graphite) + O2(g) 2WC(s) + 502(g) ---> 2WO3(s) + 2CO2(g); AH = – 1685.8 kJ %3D CO2(3); ΔΗ--393.5 kJ ---> ΔΗ--2391.8 kJ

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter7: Chemical Energy

Section: Chapter Questions

Problem 59E: In a coffee-cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M HCl are mixed to yield...

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Concept explainers

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.

Question

Consider the following reactions:
W(s) + C(graphite) ---> WC(s)
What is the enthalpy of reaction (in units of kJ) of the reaction above?
2W(s) + 302lg) --->
C(graphite) + O2(g)
2WC(s) + 502(g) ---> 2WO3(s) + 2CO2(g);
AH = -1685.8 kJ
2WO3(s);
---> CO2(g);
AH = -393.5 kJ
%3D
ΔΗ--239 1.8 kJ

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