Recent questions tagged properties-of-pure-substances

​​​​For a pure substance that expands on freezing, which of the following statement(s) is/are $\textsf{CORRECT}$?Temperature of the liquid phase can be lower than the tem...

​​​​Consider a gas obeying the relation $P(v-b)=R T$, where $b$ and $R$ are constants. Which of the following statement(s) is/are CORRECT about the specific heat capacity...

A piston-cylinder arrangement contains an ideal gas mixture of $4 \: \mathrm{kg}$ of hydrogen and $13 \: \mathrm{kg}$ of nitrogen at $250 \: \mathrm{K}$ and atmospheric p...

Air in an ideal Diesel cycle is compressed from $3 \: \mathrm{litre}$ to $0.15 \: \mathrm{litre}$. It then expands during a constant pressure heat addition process to $0....

Air at $101 \: \mathrm{kPa}$, $15^{\circ} \mathrm{C}$ and $50 \%$ relative humidity is first heated to $20^{\circ} \mathrm{C}$ in a heating coil, and then humidified by s...

A stream of superheated steam ( $2 \mathrm{MPa}, \: 300^{\circ} \mathrm{C}$) mixes with another stream of superheated steam $\left(2 \mathrm{MPa}, \: 400^{\circ} \mathrm{...

A piston-cylinder assembly having $250 \: \mathrm{mm}$ diameter contains $0.01 \: \mathrm{kg}$ of water vapor at $1 \: \mathrm{MPa}$ and $200^{\circ} \mathrm{C}$. The spe...

A steam boiler contains saturated water vapour at $200^{\circ} \mathrm{C}$. After a certain period, the temperature of the boiler drops to $110^{\circ} \mathrm{C}$. Assum...

In a piston cylinder assembly, one $\mathrm{kmol}$ of an ideal gas is compressed from an initial state of $200 \: \mathrm{kPa}$ and $400 \:\mathrm{ K}$ to a final state o...

The true density and bulk density of wheat grains are $1280 \mathrm{~kg} / \mathrm{m}^{3}$ and $740 \mathrm{~kg} / \mathrm{m}^{3}$, respectively. The porosity of the grai...

Consider that specific heat $\left(0\right.$ to $\left.50^{\circ} \mathrm{C}\right)$ of water, water vapour and air remains constant: $4.48,1.88$ and $1.0 \mathrm{~kJ} /\...

One kg of dry air at $15^{\circ} \mathrm{C}$ is isothermally compressed to one-tenth of its initial volume. The work done on the system is $\_\_\_\_\_\_ \: \mathrm{kJ}$....

The correct combination of phases in the one-component $\mathrm{H}_{2} \mathrm{O}$ phase diagram, as given below, is $\alpha$-water; $\beta$-vapour; $\gamma$-ice$\alpha-$...

The figure shows four different processes labeled $1,2,3$, and $4$ for the same closed system containing an ideal gas. The curves labeled $T_{1}, T_{2}$, and $T_{3}$ are ...

The temperature of $10$ g of liquid water $\left(c_{p}=4.2 \mathrm{~J} / \mathrm{g} . \mathrm{K}\right)$ in an insulated container is raised by $5$ K by stirring. The amo...

Following data is for an actual vapour compression refrigeration cycle. Enthalpy at compressor inlet: $246 \mathrm{~kJ} / \mathrm{kg}$Enthalpy at compressor exit: $286 \m...

A rigid tank, initially at $1$ bar and $300$ K, contains $5$ moles of $\mathrm{O}_{2}, 4$ moles of $\mathrm{N}_{2}$, and 3 moles of $\mathrm{H}_{2}$. From this tank, $2$ ...

A fixed mass of an ideal gas undergoes two different cycles $\mathbf{M}$ and $\mathbf{N}$ as shown in the Pressure $(P)$ - Volume $(V)$ diagrams. Based on the information...

In a graph with Helmholtz function on the $y$-axis and volume on the $x$-axis, the slope of the isothermal curves for a finite volume system containing an ideal gas isalw...

Match each quantity in Column $\mathbf{M}$ with the appropriate relation from Column $\mathbf{N}$. Here, $\psi$ is Helmholtz function, $P$ is pressure, $v$ is specific vo...