The effect of temperature on the spontaneity of reactions is represented as follows:
Condition Details $A$. $\Delta H: +, \Delta S: -$ $T$: any $T$,Spontaneity: Non-spontaneous $B$. $\Delta H: +, \Delta S: +$ $T$: low $T$,Spontaneity: Non-spontaneous $C$. $\Delta H: -, \Delta S: -$ $T$: low $T$,Spontaneity: Spontaneous $D$. $\Delta H: -, \Delta S: +$ $T$: any $T$,Spontaneity: Spontaneous
Which of the above conditions are correctly matched?
| Condition | Details |
|---|---|
| $A$. $\Delta H: +, \Delta S: -$ | $T$: any $T$,Spontaneity: Non-spontaneous |
| $B$. $\Delta H: +, \Delta S: +$ | $T$: low $T$,Spontaneity: Non-spontaneous |
| $C$. $\Delta H: -, \Delta S: -$ | $T$: low $T$,Spontaneity: Spontaneous |
| $D$. $\Delta H: -, \Delta S: +$ | $T$: any $T$,Spontaneity: Spontaneous |
Which of the above conditions are correctly matched?
- A$B$ and $D$ only
- B$A$ and $D$ only
- C$B$ and $C$ only
- D$A$ and $C$ only
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Similar Questions
Data given for the following reaction is as follows:
$FeO_{(s)} + C_{(\text{graphite})} \longrightarrow Fe_{(s)} + CO_{(g)}$
Substance
$\Delta H^{\circ} \text{ (kJ mol}^{-1})$
$\Delta S^{\circ} \text{ (J mol}^{-1} \text{ K}^{-1})$
$FeO_{(s)}$
$-266.3$
$57.49$
$C_{(\text{graphite})}$
$0$
$5.74$
$Fe_{(s)}$
$0$
$27.28$
$CO_{(g)}$
$-110.5$
$197.6$
The minimum temperature in $K$ at which the reaction becomes spontaneous is ....... .
(Integer answer)
$FeO_{(s)} + C_{(\text{graphite})} \longrightarrow Fe_{(s)} + CO_{(g)}$
| Substance | $\Delta H^{\circ} \text{ (kJ mol}^{-1})$ | $\Delta S^{\circ} \text{ (J mol}^{-1} \text{ K}^{-1})$ |
| $FeO_{(s)}$ | $-266.3$ | $57.49$ |
| $C_{(\text{graphite})}$ | $0$ | $5.74$ |
| $Fe_{(s)}$ | $0$ | $27.28$ |
| $CO_{(g)}$ | $-110.5$ | $197.6$ |
The minimum temperature in $K$ at which the reaction becomes spontaneous is ....... .
(Integer answer)
What is the relationship between Gibbs free energy change,enthalpy change,and entropy change?
Easy
View SolutionFor a spontaneous process,which of the following conditions is most favorable?
Medium
View SolutionLet us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However,the reaction is spontaneous at the boiling point of water. Choose the correct option.
For the reaction $C_{(graphite)} + CO_{2(g)} \rightarrow 2CO_{(g)}$,$\Delta H = 170 \ kJ$ and $\Delta S = 170 \ J/K$. At what temperature $(K)$ will the reaction become spontaneous?
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