Recent questions tagged numerical-answers

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...

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...

Air enters a hair dryer at $22^{\circ} \mathrm{C}$ and $100 \: \mathrm{kPa}$ with a velocity of $3.7 \mathrm{~m} / \mathrm{s}$, and leaves the dryer at $83{ }^{\circ} \ma...

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...

Two Carnot heat engines ($\text{E1}$ and $\text{E2}$) are operating in series as shown in figure. Engine $\text{E1}$ receives heat from a reservoir at $T_{H}=1600 \mathrm...

A particular temperature scale is obtained according to the relation:$$t=a e^{\alpha}+b$$where $a$ and $b$ are constants, and $t$ is in ${ }^{\circ} \mathrm{C}$.The therm...

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 heat of polymerization of ethylene is $25 \mathrm{kcal} / \mathrm{mol}$. The amount of heat generated during the polymerization of $5.6$ $\textsf{kg}$ polyethylene is...

The density of an amorphous polymer is $0.77 \mathrm{~g} \mathrm{~cm}^{-3}$ and that of its crystalline counterpart is $0.99 \mathrm{~g} \mathrm{~cm}^{-3}$. The density o...

Titration was used to determine the molar mass of two linear monodisperse polymers $\text{A}$ and $\text{B}$. Both the polymers possess the same repeat unit and contain a...

A unidirectional composite of a resin is prepared with continuous fibers, wherein the volume fraction of the fiber in the composite is $0.7$. Assume that the resin has a ...

A rubber contains $70 \mathrm{wt} \%$ butadiene (molar mass $=54 \mathrm{~g} / \mathrm{mol})$, $20 \: \mathrm{wt} \%$ isoprene (molar mass $=68 \mathrm{~g} / \mathrm{mol}...

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...

Potato slices weighing $50 \: \mathrm{kg}$ is dried from $60 \%$ moisture content (wet basis) to $5 \%$ moisture content (dry basis). The amount of dried potato slices ob...

The $\text{F}_{121}$ value of a known microorganism with $\text{Z}$ value of $11^{\circ} \mathrm{C}$ is $2.4 \: \mathrm{min}$ for $99.9999 \%$ inactivation. For a $12\tex...

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} /\...