Embibe Experts Solutions for Exercise 4: Assignment

An ideal gas expands according to the law $P^{2}V=$ constant. The internal energy of the gas

Neon gas of a given mass expands isothermally to double volume. What should be the further fractional decrease in pressure, so that the gas when adiabatically compressed from that state, reaches the original state?

In a thermodynamic process two moles of a monatomic ideal gas obeys $P\propto V^{-2}.$ If temperature of the gas increases from $300 \mathrm{K}$ to $400 \mathrm{K}\text{,}$ then find work done by the gas (where $R=$ universal gas constant)

Carnot cycle is plotted in $P-V$ graph. Which portion represents an isothermal expansion?

Efficiency of a heat engine working between a given source and sink is $0.5$. Coefficient of performance of the refrigerator working between the same source and the sink will be

A heat engine rejects $600 \mathrm{cal}$ to the sink at $27°\mathrm{C}$. Amount of work done by the engine will be (Temperature of source is $227°\mathrm{C} \&\mathit{ }J=4.2 \mathrm{J} {\mathrm{cal}}^{-1})$

Entropy of a system decreases

Internal energy of an ideal gas depends on