Thermodynamics PYQs - Last 10 Years

MHT CET / Chemistry / Physical Chemistry / 228 recent questions

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All Thermodynamics PYQs Last 5 Years Create chapter test

Practice 228 MHT CET Chemistry questions from Thermodynamics. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 10 Years Thermodynamics Questions

Showing 28 of 228 filtered questions.

1Thermodynamics

Find the value of \(-197^\circ\)C temperature in Kelvin.

2Thermodynamics

Two moles of an ideal gas are expanded isothermally from \(15 \mathrm{dm}^3\) to \(20 \mathrm{dm}^3\). If the amount of work done is \(-6 \mathrm{dm}^{-3}\) bar, find external pressure needed to obtain this work.

3Thermodynamics

What is the value of \(\mathrm{\Delta H-\Delta U}\) for the formation of 2 moles of ammonia from \(\mathrm{H_{2(g)}}\) and \(\mathrm{N_{2(g)}}\) ?

4Thermodynamics

When 1 mole of gas is heated at constant volume, the temperature rises form \(273 \mathrm{~K}\) to \(546 \mathrm{~K}\). If heat supplied to the gas is \(\mathrm{x~J}\), then find the correct statement from following.

5Thermodynamics

An ideal gas on isothermal reversible compression from 10L to 5L performs 1730J of work at 300 K. Calculate number of moles of gas involved in compression? (R = 8.314 J K\(^{-1}\) mol\(^{-1}\))

6Thermodynamics

Calculate change in enthalpy when 39 g acetylene is completely burnt with oxygen and enthalpy of combustion of acetylene is \(-\)1300 kJ/mol.
(At. mass C = 12, H = 1)

7Thermodynamics

Which of the following reactions shows work of compression?

8Thermodynamics

The change in internal energy of a system depends upon

9Thermodynamics

Calculate difference between \(\Delta \mathrm{H}\) and \(\Delta \mathrm{U}\) for following reaction at \(25^{\circ} \mathrm{C}\) ?
$$\mathrm{C}_2 \mathrm{H}_{6(\mathrm{~g})}+3.5 \mathrm{O}_2 \rightarrow 2 \mathrm{CO}_{2(\mathrm{~g})}+3 \mat...

10Thermodynamics

Calculate heat of formation of \(\mathrm{HCl}\) gas from following reaction.
\(\mathrm{H}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{HCl}_{(\mathrm{g})} ; \Delta \mathrm{H}=-194 \mathrm{~kJ}\)

11Thermodynamics

When 6.0 g of graphite reacts with dihydrogen to give methane gas, 37.4 kJ of heat is liberated. What is standard enthalpy of formation of $\mathrm{CH}_4(\mathrm{~g})$ ?

12Thermodynamics

For the reaction,
\(\mathrm{N}_2(g)+3 \mathrm{H}_2(g) \longrightarrow 2 \mathrm{NH}_3(g) ; \Delta H\)
is equal to

13Thermodynamics

What is standard $N \equiv N$ bond enthalpy from following reaction,
$$\begin{aligned}
& \mathrm{N}_2(g)+3 \mathrm{H}_2(g) \longrightarrow 2 \mathrm{NH}_3(g) ; \Delta H^{\circ}=-83 \mathrm{~kJ} \\
& \left(\Delta H^{\circ}(\mathrm{H}-\mathrm...

14Thermodynamics

An ideal gas expands isothermally and reversibly from \(10 \mathrm{~m}^3\) to \(20 \mathrm{~m}^3\) at \(300 \mathrm{~K}\), performing \(5.187 \mathrm{~kJ}\) of work on surrounding, calculate number of moles of gas used.

15Thermodynamics

If \(38.55 \mathrm{~kJ}\) of heat is absorbed, when 6.0 of \(\mathrm{O}_2\) react \(\mathrm{CIF}\) according to reaction.
\(2 \mathrm{CIF}(g)+\mathrm{O}_2(g) \longrightarrow \mathrm{Cl}_2(g)+\mathrm{OF}_2(g)\)
What is the standard enthalpy ...

16Thermodynamics

A sample of gas absorbs \(4000 \mathrm{~kJ}\) of heat and surrounding does \(2000 \mathrm{~J}\) of work on sample. What is the value of \(\Delta U\) ?

17Thermodynamics

Work done when 2 mole of an ideal gas is compressed from a volume of \(5 \mathrm{~m}^3\) to \(2.5 \mathrm{~m}^3\) at 300 K, under a pressure of 100 kpa is

18Thermodynamics

If entropy of a solid is greater than zero, at \(T=0\), it is called

19Thermodynamics

Based on first law of thermodynamics which of the following is correct

20Thermodynamics

A gas performs 0.320 kJ work on surrounding and absorbs 120 J of heat from the surrounding. Hence, change in internal energy is

21Thermodynamics

The temperature of $32^{\circ} \mathrm{C}$ is equivalent to

22Thermodynamics

"The mass and energy both are conserved in an isolated system", is the statement of

23Thermodynamics

Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at $27^{\circ} \mathrm{C} ?\left(R=2 \mathrm{cal} \mathrm{K}^{-1} \mathrm{~mol}^{-1}\right)$

24Thermodynamics

For a process, entropy change of a system is expressed as

25Thermodynamics

Three moles of an ideal gas are expanded isothermally from a volume of $300 \mathrm{~cm}^3$ to 2.5 L at 300 K against a pressure of 1.9 atm . The work done in joules is

26Thermodynamics

$$\begin{aligned} & \text { If } \mathrm{C}(s)+\mathrm{O}_2(g) \rightarrow \mathrm{CO}_2(g), \Delta H=-X \\ & \mathrm{CO}(g)+\frac{1}{2} \mathrm{O}_2(g) \rightarrow \mathrm{CO}_2(g), \Delta H=-Y \end{aligned}$$ Calculate $\Delta_f H$ for $\...

27Thermodynamics

Two moles of an ideal gas is expanded isothermally and reversibly at 300 K from 1 L to 10 L . The enthalpy change in kJ is

28Thermodynamics

Identify the equation in which change in enthalpy is equal to change in internal energy