Thermodynamics

1 mole of an ideal gas undergoes the following processes：
Process $A \rightarrow$ Isothermal expansion at 400 K from volume $\mathrm{V}_1$ to volume $\mathrm{V}_2$ ，such that $\mathrm{V}_2=4 \mathrm{~V}_1$
Process $B \rightarrow$ Adiabatic...

Three engines $\mathrm{A}, \mathrm{B}$ and C take steam at $130^{\circ} \mathrm{C}$ and reject it at $20^{\circ} \mathrm{C}, 40^{\circ} \mathrm{C}$ and $50^{\circ} \mathrm{C}$ respectively．The most efficient engine will be

$X$ is an extensive property and $x$ is an intensive property of a thermodynamic system. Which of the following statement(s) is (are) correct?

For a spontaneous process, the incorrect statement is

Which of the following statements is correct for a spontaneous polymerization reaction ?

For a spontaneous reaction at all temperatures which of the following is correct?

For spontaneous polymerisation, which of the following is (are) correct?

An ideal gas expands adiabatically against vacuum. Which of the following is correct for the given process?

At constant pressure, the heat of formation of a compound is not dependent on temperature, when

The quantity hv/KB corresponds to

For the equilibrium, H2O(l) \(\rightleftharpoons\) H2O(v), which of the following is correct?

Among the following, the extensive variables are

During a reversible adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio \({{{C_p}} \over {{C_v}}}\) for the gas is

The heat of neutralisation of a strong base and a strong acid is 13.7 kcal. The heat released when 0.6 mole HCl solution is added to 0.25 mole of NaOH is

The condition for a reaction to occur spontaneously is

Which of the following plots represent an exothermic reaction?