Questions and Answers
For reaction 1, should the pressure be low or high to give the greatest yield of products?
high
For reaction 1, give a reason for your choice regarding pressure.
There are fewer moles of gas on the product side (1 mole of CO2 and 4 moles of H2) compared to the reactant side (1 mole of CH4 and 2 moles of H2O), making high pressure favorable.
For reaction 1, should the temperature be low or high to give the greatest yield of products?
low
For reaction 1, give a reason for your choice regarding temperature.
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Study Notes
Reaction Conditions for Maximum Yield
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Reversible Reactions Examined:
- Reaction 1: CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) with ΔH = +165 kJ/mol
- Reaction 2: CO(g) + H2O(g) ⇌ CO2(g) + H2(g) with ΔH = -41 kJ/mol
- Reaction 3: CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g) with ΔH = -206 kJ/mol
Effects of Pressure on Yield
- Prediction for Reaction 1: High pressure should be applied to maximize product yield.
- Reasoning: Increasing pressure favors the side of the reaction with fewer gas moles; Reaction 1 produces 5 moles (reactants) to 4 moles (products).
Effects of Temperature on Yield
- Prediction for Reaction 1: Low temperature should be applied to maximize product yield.
- Reasoning: For endothermic reactions, decreasing temperature shifts equilibrium to the right, favoring product formation as it is energetically less favorable to form products at high temperatures.
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Description
Test your understanding of the reaction conditions that maximize yield in reversible reactions. This quiz explores how pressure and temperature influence the outcomes of various chemical reactions. Delve into the specifics of endothermic and exothermic reactions to boost your knowledge.
