Second Law of Thermodynamics

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

In an experiment, $1\mathrm{kg}$ of water, initially at $283\mathrm{K}$ is heated to $363\mathrm{K}$ via two processes. In process I, water is brought into contact with a heat reservoir at $363\mathrm{K}$. In process II, water is first brought into contact with a heat reservoir at $323\mathrm{K}$ and then in contact with another reservoir at $363\mathrm{K}$. Assume that the specific heat capacity of water, $C$ is independent of temperature. Choose the correct options from the following. (Note $\ln \left(363\right)=5.8944; \ln \left(323\right)=5.7777; \ln \left(283\right)=5.6454$)

An ice cube of mass $30 \mathrm{g}$ at $0^0\mathrm{C}$ is left sitting on the kitchen table where it gradually melts and reaches the kitchen temperature of ${25}^0\mathrm{C}$. The latent heat of fusion for ice is $333 \mathrm{J}·{\mathrm{g}}^{-1}$ and the specific heat of water is $4.2 \mathrm{J}·{\mathrm{g}}^{-1}·{\mathrm{K}}^{-1}$. Select the correct statement(s) about this process. (All numerical values in the answers are rounded to the closest integer.)

Two solid blocks at temperatures $T_1$ and $T_2\left(T_1<T_2\right)$ are put in thermal contact for a long time inside an insulated container. Choose the correct statement(s).

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.

Clausius's statement is a part of

A refrigerator operates on:

The wavelength associated with the electron will be

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

Choose the incorrect relation among these