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?
- A$710$
- B$910$
- C$1110$
- D$510$
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The temperature in $K$ at which $\Delta G = 0$,for a given reaction with $\Delta H = -20.5 \ kJ \ mol^{-1}$ and $\Delta S = -50.0 \ J \ K^{-1} \ mol^{-1}$ is:
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?
Identify from the following the correct set of thermodynamic conditions for the reaction to be spontaneous at all temperatures.
One mole of an ideal gas at $1 \ atm$ pressure is filled in a bulb of $10 \ L$ capacity and is connected to a vacuum bulb of $100 \ L$ capacity. How much work is done in this process in Joules?
Easy
View SolutionCalculate the work done in Joules $(J)$ when $50 \ g$ of iron is dissolved in $HCl$ in an open beaker at $25 \ ^oC$. The atmospheric pressure is $1 \ atm$.
Medium
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