Grade 11 Chemistry Thermodynamics Practice Quiz - Set 1

Question 1

Which type of thermodynamic system allows neither energy nor matter to cross its boundary with the surroundings?

Accepted Answer

C) Isolated system

Answer

A) Open system

Answer

B) Closed system

Answer

D) Homogeneous system

Question 2

Which of the following is an extensive property of a system?

Accepted Answer

A) Internal Energy ($U$)

Answer

B) Temperature ($T$)

Answer

C) Density ($

ho$)

Answer

D) Refractive index

Question 3

What is the correct mathematical expression of the First Law of Thermodynamics for a system?

Accepted Answer

B) $\Delta U = q + w$

Answer

A) $\Delta U = q - w$

Answer

C) $q = \Delta U + H$

Answer

D) $\Delta H = q - w$

Question 4

Which of the following variables is classified as a path function?

Accepted Answer

D) Work ($w$)

Answer

A) Enthalpy ($H$)

Answer

B) Internal energy ($U$)

Answer

C) Entropy ($S$)

Question 5

A gas expands by 2.0 L against a constant external pressure of 1.0 atm. (Given: $1 ext{ L atm} = 101.3 ext{ J}$).

Calculate the work done ($w$) on the system during this expansion.

Accepted Answer

B) -202.6 J

Answer

A) +202.6 J

Answer

C) -101.3 J

Answer

D) +101.3 J

Question 6

For an ideal gas undergoing an isothermal process, what is the value of internal energy change ($ \Delta U$)?

Accepted Answer

A) $\Delta U = 0$

Answer

B) $\Delta U > 0$

Answer

C) $\Delta U < 0$

Answer

D) $\Delta U = q$

Question 7

In which of the following thermodynamic processes is there no heat exchange between system and surroundings ($q = 0$)?

Accepted Answer

C) Adiabatic process

Answer

A) Isothermal process

Answer

B) Isobaric process

Answer

D) Isochoric process

Question 8

What is the expansion work done ($w$) during an isochoric process?

Accepted Answer

A) 0

Answer

B) $P\Delta V$

Answer

C) $q_p$

Answer

D) $R\Delta T$

Question 9

What is the relation between molar heat capacity at constant pressure ($C_p$) and constant volume ($C_v$) for an ideal gas?

Accepted Answer

B) $C_p - C_v = R$

Answer

A) $C_v - C_p = R$

Answer

C) $C_p + C_v = R$

Answer

D) $C_p / C_v = R$

Question 10

Which condition correctly characterizes an exothermic reaction occurring at constant pressure?

Accepted Answer

A) $\Delta H < 0$

Answer

B) $\Delta H > 0$

Answer

C) $\Delta H = 0$

Answer

D) $\Delta U = 0$

Question 11

By standard thermodynamic convention, what is the standard enthalpy of formation ($\Delta_f H^\circ$) of an element in its standard reference state?

Accepted Answer

C) 0 kJ/mol

Answer

A) +100 kJ/mol

Answer

B) -1.0 kJ/mol

Answer

D) Depends on temperature only

Question 12

According to Hess's Law of Constant Heat Summation, the total enthalpy change of a chemical reaction depends on:

Accepted Answer

B) Only the initial reactants and final products states

Answer

A) The number of intermediate steps in the reaction

Answer

C) The rate of the chemical reaction

Answer

D) The presence of a catalyst

Question 13

What is the standard SI unit for molar entropy ($S$)?

Accepted Answer

D) $	ext{J K}^{-1}	ext{ mol}^{-1}$

Answer

A) $	ext{J mol}^{-1}$

Answer

B) $	ext{kJ K}^{-1}$

Answer

C) $	ext{J K}$

Question 14

Under what condition will a process be spontaneous at ALL temperatures?

Accepted Answer

A) $\Delta H < 0$ and $\Delta S > 0$

Answer

B) $\Delta H > 0$ and $\Delta S < 0$

Answer

C) $\Delta H > 0$ and $\Delta S > 0$

Answer

D) $\Delta H < 0$ and $\Delta S < 0$

Question 15

What is the correct expression for Gibbs free energy change ($\Delta G$)?

Accepted Answer

B) $\Delta G = \Delta H - T\Delta S$

Answer

A) $\Delta G = \Delta H + T\Delta S$

Answer

C) $\Delta G = \Delta U - P\Delta V$

Answer

D) $\Delta G = T\Delta H - \Delta S$

Question 16

When a reversible reaction reaches thermodynamic equilibrium at constant temperature and pressure, what is the value of $\Delta G$?

Accepted Answer

C) $\Delta G = 0$

Answer

A) $\Delta G > 0$

Answer

B) $\Delta G < 0$

Answer

D) $\Delta G = \Delta H$

Question 17

The heat evolved or absorbed by a system at constant pressure ($q_p$) is equal to which thermodynamic state function?

Accepted Answer

A) $\Delta H$

Answer

B) $\Delta U$

Answer

C) $\Delta G$

Answer

D) $w$

Question 18

The Third Law of Thermodynamics states that the entropy of a pure, perfectly crystalline substance approaches zero at:

Accepted Answer

B) 0 K

Answer

A) $0^\circ	ext{C}$

Answer

C) 273.15 K

Answer

D) 298.15 K

Question 19

Consider the gaseous reaction: $$N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)$$

What is the value of $\Delta n_g$ (change in number of moles of gaseous products and reactants)?

Accepted Answer

D) -2

Answer

A) +2

Answer

B) +1

Answer

C) -1

Question 20

Which of the following properties is intensive?

Accepted Answer

A) Temperature

Answer

B) Volume

Answer

C) Mass

Answer

D) Enthalpy

Grade 11 : Chemistry - Thermodynamics (Set 1)

Grade 11 : Chemistry - Thermodynamics (Set 1)— Questions & Detailed Solutions

Which type of thermodynamic system allows neither energy nor matter to cross its boundary with the surroundings?

Which of the following is an extensive property of a system?

What is the correct mathematical expression of the First Law of Thermodynamics for a system?

Which of the following variables is classified as a path function?

A gas expands by 2.0 L against a constant external pressure of 1.0 atm. (Given: $1\text{ L atm} = 101.3\text{ J}$).
Calculate the work done ($w$) on the system during this expansion.

For an ideal gas undergoing an isothermal process, what is the value of internal energy change ($ \Delta U$)?

In which of the following thermodynamic processes is there no heat exchange between system and surroundings ($q = 0$)?

What is the expansion work done ($w$) during an isochoric process?

What is the relation between molar heat capacity at constant pressure ($C_p$) and constant volume ($C_v$) for an ideal gas?

Which condition correctly characterizes an exothermic reaction occurring at constant pressure?

By standard thermodynamic convention, what is the standard enthalpy of formation ($\Delta_f H^\circ$) of an element in its standard reference state?

According to Hess's Law of Constant Heat Summation, the total enthalpy change of a chemical reaction depends on:

What is the standard SI unit for molar entropy ($S$)?

Under what condition will a process be spontaneous at ALL temperatures?

What is the correct expression for Gibbs free energy change ($\Delta G$)?

When a reversible reaction reaches thermodynamic equilibrium at constant temperature and pressure, what is the value of $\Delta G$?

The heat evolved or absorbed by a system at constant pressure ($q_p$) is equal to which thermodynamic state function?

The Third Law of Thermodynamics states that the entropy of a pure, perfectly crystalline substance approaches zero at:

Consider the gaseous reaction: $$N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)$$
What is the value of $\Delta n_g$ (change in number of moles of gaseous products and reactants)?

Which of the following properties is intensive?

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Grade 11 : Chemistry - Thermodynamics (Set 1)

Grade 11 : Chemistry - Thermodynamics (Set 1)— Questions & Detailed Solutions

Which type of thermodynamic system allows neither energy nor matter to cross its boundary with the surroundings?

Which of the following is an extensive property of a system?

What is the correct mathematical expression of the First Law of Thermodynamics for a system?

Which of the following variables is classified as a path function?

A gas expands by 2.0 L against a constant external pressure of 1.0 atm. (Given: $1\text{ L atm} = 101.3\text{ J}$).Calculate the work done ($w$) on the system during this expansion.

For an ideal gas undergoing an isothermal process, what is the value of internal energy change ($ \Delta U$)?

In which of the following thermodynamic processes is there no heat exchange between system and surroundings ($q = 0$)?

What is the expansion work done ($w$) during an isochoric process?

What is the relation between molar heat capacity at constant pressure ($C_p$) and constant volume ($C_v$) for an ideal gas?

Which condition correctly characterizes an exothermic reaction occurring at constant pressure?

By standard thermodynamic convention, what is the standard enthalpy of formation ($\Delta_f H^\circ$) of an element in its standard reference state?

According to Hess's Law of Constant Heat Summation, the total enthalpy change of a chemical reaction depends on:

What is the standard SI unit for molar entropy ($S$)?

Under what condition will a process be spontaneous at ALL temperatures?

What is the correct expression for Gibbs free energy change ($\Delta G$)?

When a reversible reaction reaches thermodynamic equilibrium at constant temperature and pressure, what is the value of $\Delta G$?

The heat evolved or absorbed by a system at constant pressure ($q_p$) is equal to which thermodynamic state function?

The Third Law of Thermodynamics states that the entropy of a pure, perfectly crystalline substance approaches zero at:

Consider the gaseous reaction: $$N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)$$What is the value of $\Delta n_g$ (change in number of moles of gaseous products and reactants)?

Which of the following properties is intensive?

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A gas expands by 2.0 L against a constant external pressure of 1.0 atm. (Given: $1\text{ L atm} = 101.3\text{ J}$).
Calculate the work done ($w$) on the system during this expansion.

Consider the gaseous reaction: $$N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)$$
What is the value of $\Delta n_g$ (change in number of moles of gaseous products and reactants)?