(C) The process is the sublimation of dry ice: $CO_{2(s)} \rightarrow CO_{2(g)}$.$1$. Sublimation is an endothermic process,meaning heat is absorbed f

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Both $\Delta H$ and $\Delta S$ are positive

(C) The process is the sublimation of dry ice: $CO_{2(s)} \rightarrow CO_{2(g)}$.$1$. Sublimation is an endothermic process,meaning heat is absorbed from the surroundings,so $\Delta H > 0$ (positive).$2$. The transition from solid to gas represents a significant increase in the randomness or disorder of the system,so $\Delta S > 0$ (positive).Therefore,both $\Delta H$ and $\Delta S$ are positive.

Class 11 Chemistry Thermodynamics Basic concepts

Medium

For the process dry ice $\rightarrow CO_{2(g)}$,which of the following is true regarding the thermodynamic parameters?

A
$\Delta H$ is positive while $\Delta S$ is negative
B
Both $\Delta H$ and $\Delta S$ are negative
C
Both $\Delta H$ and $\Delta S$ are positive
D
$\Delta H$ is negative while $\Delta S$ are positive

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If the enthalpy of $B$ is greater than that of $A$,the reaction $A \to B$ is

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Which of the following is $NOT$ an intensive property?

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Fill in the blanks:
$(i)$ The change in heat energy during a chemical reaction at constant volume is called .......
$(ii)$ During a ....... process,there is no absorption or evolution of heat.
$(iii)$ The equation $\Delta G = \Delta H - T \Delta S$ was proposed by .......

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Explain extensive property and intensive property.

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In an isothermal and reversible process,$1.6 \times 10^{-2} \ kg$ of $O_2$ expands from $10 \ dm^3$ to $100 \ dm^3$ at $300 \ K$. The work done in the process is: $(R = 8.314 \ J \ K^{-1} \ mol^{-1})$ (in $J$)

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For the process dry ice $\rightarrow CO_{2(g)}$,which of the following is true regarding the thermodynamic parameters?

Similar Questions

If the enthalpy of $B$ is greater than that of $A$,the reaction $A \to B$ is

Which of the following is $NOT$ an intensive property?

Fill in the blanks:$(i)$ The change in heat energy during a chemical reaction at constant volume is called .......$(ii)$ During a ....... process,there is no absorption or evolution of heat.$(iii)$ The equation $\Delta G = \Delta H - T \Delta S$ was proposed by .......

Explain extensive property and intensive property.

In an isothermal and reversible process,$1.6 \times 10^{-2} \ kg$ of $O_2$ expands from $10 \ dm^3$ to $100 \ dm^3$ at $300 \ K$. The work done in the process is: $(R = 8.314 \ J \ K^{-1} \ mol^{-1})$ (in $J$)

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Fill in the blanks:
$(i)$ The change in heat energy during a chemical reaction at constant volume is called .......
$(ii)$ During a ....... process,there is no absorption or evolution of heat.
$(iii)$ The equation $\Delta G = \Delta H - T \Delta S$ was proposed by .......