Second Law of Thermodynamics

In which part , air and gas(petrol) mixes in internal combustion engine?

What is the entropy change (in ${\mathrm{JK}}^{-1}{\mathrm{mol}}^{-1}$ ) when one mole of ice is converted into water at  $0°\mathrm{C}$? (The enthalpy change for the conversion of ice to liquid water  $6.0\hspace{0.17em}\mathrm{kJ}\hspace{0.17em}{\mathrm{mol}}^{-1}\mathrm{\hspace{0.17em}}\mathrm{at}\mathrm{\hspace{0.17em}}0°\mathrm{C}$)

For an increase in the entropy define ____ of nature.

Which of the following option are correct for the second law of thermodynamics?

The process which is not reversible is called _____.

The cause of irreversibility of a natural process is:

Causes of irreversible process.

The process which is not reversible is an irreversible process?

An ideal gas heat engine operates in Carnot cycle between $227 °\mathrm{C}$ and $127 °\mathrm{C}$. It absorbs $6\times 10^4$ cal of heat at high temperature. Amount of heat converted to work is:

Heat cannot by itself flow from a body at lower temperature to a body at higher temperature” is a statement or consequence of

Mention the causes for irreversibility of a process.

Graphs below show the entropy versus energy $U$ of two systems $1$ and $2$ at constant volume. The initial energies of the systems are indicated by $U_{1, i}$ and $U_{2, i} ,$ respectively. Graphs are drawn to the same scale. The systems are then brought into thermal contact with each other. Assume that, at all times the combined energy of the two systems remains constant. Choose the most appropriate option indicating the energies of the two systems and the total entropy after they achieve the equilibrium.

The change in entropy when a $30 \mathrm{g}$ ice cube at $-12°\mathrm{C}$ is transformed into water at $100°\mathrm{C}$ $($in $\mathrm{J}/\mathrm{K})$ is

$($Take $\ell \mathrm{n}\left(\frac{273}{261}\right)=0.04; \ell \mathrm{n}\left(\frac{373}{273}\right)=0.312$, ${\mathrm{S}}_{\mathrm{ice}}=2100 \mathrm{J}/\mathrm{kg}-{}^{\circ }\mathrm{C},$$\left.{\mathrm{S}}_{\text{water}}=4200 \mathrm{J}/\mathrm{kg}-{}^{\circ }\mathrm{C}, {\mathrm{L}}_{\mathrm{f}}=3.33\times {10}^5 \mathrm{J}/\mathrm{kg}\right)$

Clausius's statement is a part of

A refrigerator operates on:

The wavelength associated with the electron will be

One mole of ideal monoatomic gas is taken along a cyclic process as shown in the figure. Process
1 → 2 shown is 1/4^th part of a circle as shown by dotted line process 2 → 3 is isochoric while
3 → 1 is isobaric. If efficiency of the cycle is n% where n is an integer. Find n.

One mole of an ideal monatomic gas undergoes the following four reversible processes:
Step $1 :$ It is first compressed adiabatically from volume $V_1$ to $1 {\mathrm{m}}^2.$
Step $2 :$ then expanded isothermally to volume $10 {\mathrm{m}}^3$
Step $3 :$ then expanded adiabatically to volume $V_3$
Step $4 :$ then compressed isothermally to volume $V_1.$ If the efficiency of the above cycle is $\frac{3}{4}$ then $V_1$ is

What is the entropy change in $J{K}^{-1}$ during the melting of 27.3 g of ice of $0^{o}C$ ? (Latent heat of fusion of ice = 330 $J{g}^{-1}$ )