1. Coal gasification converts coal into a combustible mixture of carbon monoxide and hydrogen, called coal gas, in a gasifier: H2Oq) + C(s) –→ CO(g)+ H2(g) AHo = ? Calculate the standard enthalpy change for this reaction from the following chemical equations: 2 C(s) + O2(g)→ 2 CO(g) AHo = -222 kJ 2 H2(g) + O2(g) → H2O1) → 2H2O(g) AHo = -484 kJ H2O(g) AHo = +44 kJ This coal gas can be used a fuel: CO(g) + H2(g) + O2(g) CO2(g) + H2O(g) 2. Predict the change in enthalpy for this combustion reaction from the following equations: 2 C(s) + O2(g) → 2 CO(g) AHo = -222 kJ C(s) + O2(g) 2 Н(9) + Ог(g) → CO2(g) AHo = -394 kJ 2H2O(g) AHo = -484 kJ 3. Use the following calorimetrically determined enthalpy changes to predict the standard enthalpy change for the reaction of ethene with chlorine gas. C2H4(g) + Cl2(g) → C2H3C1(g) + HCl(g) AHo = ? H2(g) + Cl2(g) → 2HCI(g) AHo = -185 kJ C2H4(g) + HCl(g) → C2H5C11) AHo = -65 kJ C2H3C1(g) + H2(g) → C2H5C14) AH. = -140 kJ
1. Coal gasification converts coal into a combustible mixture of carbon monoxide and hydrogen, called coal gas, in a gasifier: H2Oq) + C(s) –→ CO(g)+ H2(g) AHo = ? Calculate the standard enthalpy change for this reaction from the following chemical equations: 2 C(s) + O2(g)→ 2 CO(g) AHo = -222 kJ 2 H2(g) + O2(g) → H2O1) → 2H2O(g) AHo = -484 kJ H2O(g) AHo = +44 kJ This coal gas can be used a fuel: CO(g) + H2(g) + O2(g) CO2(g) + H2O(g) 2. Predict the change in enthalpy for this combustion reaction from the following equations: 2 C(s) + O2(g) → 2 CO(g) AHo = -222 kJ C(s) + O2(g) 2 Н(9) + Ог(g) → CO2(g) AHo = -394 kJ 2H2O(g) AHo = -484 kJ 3. Use the following calorimetrically determined enthalpy changes to predict the standard enthalpy change for the reaction of ethene with chlorine gas. C2H4(g) + Cl2(g) → C2H3C1(g) + HCl(g) AHo = ? H2(g) + Cl2(g) → 2HCI(g) AHo = -185 kJ C2H4(g) + HCl(g) → C2H5C11) AHo = -65 kJ C2H3C1(g) + H2(g) → C2H5C14) AH. = -140 kJ
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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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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
Transcribed Image Text:Determine AH. for each of the following problems.
1. Coal gasification converts coal into a combustible mixture of carbon monoxide and hydrogen,
called coal gas, in a gasifier: H2Oq) + C(s) → CO(g) + H2(g) AHo = ?
Calculate the standard enthalpy change for this reaction from the following chemical equations:
2 C(s) + O2(g) → 2 CO(g) AHo = -222 kJ
2 H2(g) + O2(g)→ 2H2O(g) AHo = -484 kJ
H2O(1 -
H2O(g) AHo = +44 kJ
%3D
This coal gas can be used a fuel: CO(g) + H2(g) + O2(g)
→ CO2(g) + H2O(g)
2.
Predict the change in enthalpy for this combustion reaction from the following equations:
2 C(s) + O2(g) → 2 CO(g) AHo = -222 kJ
C(s) + O2(g) → CO2(g) AHo =
2 H2(g) + O2(g)→ 2H2O(g) AHo = -484 kJ
:-394 kJ
3. Use the following calorimetrically determined enthalpy changes to predict the standard
enthalpy change for the reaction of ethene with chlorine gas.
C2H4(g) + Cl2(g) → C2H3C1(g) + HCl(g) AHo = ?
H2(g) + Cl2(g) → 2HC1(g) AHo = -185 kJ
C2H4(g) + HCl(g) -
C2H3C1(g) + H2(g) → C2H5C1@) AHo = -140 kJ
C2H5C14) AHo = -65 kJ
%3D
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