Thermodynamics Individual Quiz
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Last updated over 3 years ago
7 questions
Required
1
HCl dissolves readily in water to form an acidic solution. HCl (g) → H+(aq) + Cl–(aq)
What will be the change in entropy?
HCl dissolves readily in water to form an acidic solution.
HCl (g) → H+(aq) + Cl–(aq)
What will be the change in entropy?
Required
1
Above 840°C, calcium carbonate will decompose to produce calcium oxide and carbon dioxide gas. CaCO3(s) → CaO(s) + CO2(g)
What is the entropy change of the reaction?
Above 840°C, calcium carbonate will decompose to produce calcium oxide and carbon dioxide gas. CaCO3(s) → CaO(s) + CO2(g)
What is the entropy change of the reaction?
Required
1
Sodium hydroxide reacts with copper sulfate to give a pale blue precipitate. 2NaOH(aq) + CuSO4(aq) → Cu(OH)2(s) + Na2SO4 (aq) What is the entropy change of the reaction?
Sodium hydroxide reacts with copper sulfate to give a pale blue precipitate.
2NaOH(aq) + CuSO4(aq) → Cu(OH)2(s) + Na2SO4 (aq)
What is the entropy change of the reaction?
Required
1
Describe and explain the change in entropy when water is heated from 293K to 343K?
Describe and explain the change in entropy when water is heated from 293K to 343K?
Required
1
Which of the following can explain why an endothermic reaction can be spontaneous?
Which of the following can explain why an endothermic reaction can be spontaneous?
Required
1
Methanol undergoes combustion and produces carbon dioxide and water. Using the standard molar entropy values, calculate the standard entropy change of combustion of methanol.[Standard entropy values/ J K−1 mol−1: CH3OH(l): 126.8, O2(g): 205.0, CO2(g): 213.6, H2O(l): 69.9]
Methanol undergoes combustion and produces carbon dioxide and water.
Using the standard molar entropy values, calculate the standard entropy change of combustion of methanol.
[Standard entropy values/ J K−1 mol−1: CH3OH(l): 126.8, O2(g): 205.0, CO2(g): 213.6, H2O(l): 69.9]
Required
1
2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g) [standard enthalpy change of reaction, ∆H = −135.6 kJ mol−1 ; standard entropy change of reaction ∆S = −334 J K−1 mol−1]
What is the maximum temperature for which this reaction is spontaneous?
2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)
[standard enthalpy change of reaction, ∆H = −135.6 kJ mol−1 ; standard entropy change of reaction ∆S = −334 J K−1 mol−1]
What is the maximum temperature for which this reaction is spontaneous?