Recent questions tagged properties-of-pure-substances

A gas is pressurized in a vertical frictionless piston-cylinder device, as shown in the figure. The piston has a mass of $4$ kg and a cross-sectional area of $40 \mathrm{...

Consider a mixture of ideal gases, nitrogen $\left(\mathrm{N}_{2}\right)$ and carbon-dioxide $\left(\mathrm{CO}_{2}\right)$, at $25^{\circ} \mathrm{C}$ and $101$ $\mathrm...

A stream of moist air at $101$ $\mathrm{kPa}$ and $25^{\circ} \mathrm{C}$ undergoes a constant pressure process such that its dry bulb temperature increases and specific ...

Which of the following is/are example(s) of a pure substance at $25^{\circ} \mathrm{~C}$ and $101$ $\mathrm{kPa}$?Gaseous oxygenMixture of liquid water and water vaporMix...

Consider a real gas, which obeys the following equation-of-state:$$v=\dfrac{R T}{P}+C_{1}-\dfrac{C_{2}}{P v},$$where $v$ is the mass specific volume, $P$ is the pressure,...

A fluid undergoes a process where its pressure $(P)$, temperature $(T)$ and volume $(V)$ changes from $\left(P_{1}, T_{1}, V_{1}\right)$ to $\left(P_{2}, T_{2}, V_{2}\rig...

Consider a single component fluid at saturation conditions having the following properties.Latent heat of vaporization, $h_{f g}=39.6 \times 10^{3} \mathrm{~kJ} / \mathrm...

 It is given that: $\left(\dfrac{\partial h}{\partial T}\right)_{P}=c_{p}$ and $\left(\dfrac{\partial h}{\partial P}\right)_{T}=(v-\beta T v)$. Here $h$ is the mass speci...

A stream of moist air enters an adiabatic saturator at $45^{\circ} \mathrm{C}$ and $101$ $\mathrm{kPa}$ and leaves as a saturated mixture at $30^{\circ} \mathrm{C}$. Make...

A mixture of helium $\text{(He)}$ and nitrogen ($\mathrm{N}_{2}$) expands in a turbine from $800$ $\mathrm{kPa}$ to $100$ $\mathrm{kPa}$. The mixture composition is $40\%...

A rigid and impermeable tank has only moist air with a specific humidity of $0.025 \mathrm{~kg}_{\text {water-vapor }} / \mathrm{kg}_{\text{dry-air}}$ at $30^{\circ} \mat...

An insulating polymer is used as a dielectric medium between two capacitor plates. The dielectric constant of the polymer is $5.0$ and the permittivity of vacuum is $8.85...

The mass (in $\mathrm{kg}$) of dry air in a room, measuring $10 m \times 7 m \times 3 m$, is $\_\_\_\_$. (rounded off to two decimal places)[Density of dry air is $1.029 ...

The temperature of a dry air parcel is $20^{\circ} \mathrm{C}$ at a height of $150$ $\mathrm{m}$ with atmospheric pressure of $1000$ $\mathrm{hPa}$. If the air parcel ris...

A fuel with composition by mass is given as $78 \%$ carbon $(\mathrm{C}), 16 \%$ hydrogen $\left(\mathrm{H}_{2}\right)$, $3.2 \%$ sulphur $(\mathrm{S}), 1.6 \%$ oxygen $\...

​​The triple point $\left(T_{l}, P_{l}\right)$ is shown in a schematic phase diagram (pressure $(\mathrm{P})-$ temperature $(\mathrm{T})$ plot) for one component system. ...

​​​​​​A cylinder of volume $0.1 \mathrm{~m}^{3}$ is filled with nitrogen at $10 \: \mathrm{MPa}$ and $300 \: \mathrm{K}$. Consider nitrogen to be an ideal gas. The cylind...

​​​The inlet and outlet temperatures of the flowing fluid during a steady state flow process are the same as that of the surroundings. If the changes in kinetic and poten...

A rigid tank of $300 \: \mathrm{litre}$ capacity contains $3 \: \mathrm{kg}$ of oxygen (molar mass $=32 \mathrm{~kg} / \mathrm{kmol}$ ) at $25^{\circ} \mathrm{C}$. If oxy...

​​​​For an ideal gas turbine cycle, $T_{1}$ and $T_{3}$ are the compressor inlet temperature and turbine inlet temperature respectively. The ratio $\frac{T_{3}}{T_{1}}$ i...