(C) The formation reaction of $CO_{2(g)}$ is: $C_{(s)} + O_{2(g)} \to CO_{2(g)}$ The standard entropy of formation $\Delta_f S^o$ is calculated as: $\

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(C) The formation reaction of $CO_{2(g)}$ is: $C_{(s)} + O_{2(g)} \to CO_{2(g)}$ The standard entropy of formation $\Delta_f S^o$ is calculated as: $\Delta_f S^o = S^o(CO_{2(g)}) - [S^o(C_{(s)}) + S^o(O_{2(g)})]$ Substituting the given values: $\Delta_f S^o = 213.5 - (5.690 + 205) \ J \ K^{-1} \ mol^{-1}$ $\Delta_f S^o = 213.5 - 210.690 \ J \ K^{-1} \ mol^{-1}$ $\Delta_f S^o = 2.81 \ J \ K^{-1} \ mol^{-1}$ Therefore,the correct option is $C$.

Class 11 Chemistry Thermodynamics 2 nd Law of thermodynamics and Entropy

Easy

The standard entropies of $CO_{2(g)}$,$C_{(s)}$ and $O_{2(g)}$ are $213.5$,$5.690$ and $205 \ J \ K^{-1} \ mol^{-1}$ respectively. The standard entropy of formation of $CO_{2(g)}$ is ...... $J \ K^{-1} \ mol^{-1}$.

A
$1.86$
B
$1.96$
C
$2.81$
D
$2.86$

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Class 11

Chemistry Questions

Chapter

Thermodynamics

Subtopic

2 nd Law of thermodynamics and Entropy

Which of the following processes takes place with a decrease of entropy?

EasyAIIMS 2011

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The enthalpy change for the transition of liquid water to steam,$\Delta H_{vap} = 37.3 \ kJ \ mol^{-1}$ at $373 \ K$. The entropy change for the process is......$J \ mol^{-1} K^{-1}$.

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Given that $\Delta H = 0$ for the mixing of two gases,explain whether the diffusion of these gases into each other in a closed container is a spontaneous process or not?

Easy

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The standard molar entropy of $H_{2}O_{(l)}$ is $70 \ J \ K^{-1} \ mol^{-1}$. Will the standard molar entropy of $H_{2}O_{(s)}$ be more or less than $70 \ J \ K^{-1} \ mol^{-1}$?

Easy

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Which of the following processes is associated with an increase in entropy?
$(I)$ Melting of a solid
$(II)$ Mixing of gases
$(III)$ Compression of a gas
$(IV)$ Expansion of a gas

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The standard entropies of $CO_{2(g)}$,$C_{(s)}$ and $O_{2(g)}$ are $213.5$,$5.690$ and $205 \ J \ K^{-1} \ mol^{-1}$ respectively. The standard entropy of formation of $CO_{2(g)}$ is ...... $J \ K^{-1} \ mol^{-1}$.

Similar Questions

Which of the following processes takes place with a decrease of entropy?

The enthalpy change for the transition of liquid water to steam,$\Delta H_{vap} = 37.3 \ kJ \ mol^{-1}$ at $373 \ K$. The entropy change for the process is......$J \ mol^{-1} K^{-1}$.

Given that $\Delta H = 0$ for the mixing of two gases,explain whether the diffusion of these gases into each other in a closed container is a spontaneous process or not?

The standard molar entropy of $H_{2}O_{(l)}$ is $70 \ J \ K^{-1} \ mol^{-1}$. Will the standard molar entropy of $H_{2}O_{(s)}$ be more or less than $70 \ J \ K^{-1} \ mol^{-1}$?

Which of the following processes is associated with an increase in entropy?$(I)$ Melting of a solid$(II)$ Mixing of gases$(III)$ Compression of a gas$(IV)$ Expansion of a gas

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Which of the following processes is associated with an increase in entropy?
$(I)$ Melting of a solid
$(II)$ Mixing of gases
$(III)$ Compression of a gas
$(IV)$ Expansion of a gas