148549 A diatomic ideal gas is used in Carnot's engine as working substance. During adiabatic expansion of the cycle, if the volume of the gas increases from $\mathrm{V}$ to $32 \mathrm{~V}$, then the efficiency of the engine is

148550 A reversible Carnot heat engine converts $\frac{1}{4}$ th of its input heat into work. When the temperature of the sink is reduced by $50 \mathrm{~K}$, its efficiency becomes $33 \frac{1}{3} \%$. The initial temperatures of the source and the sink respectively are

148551 Freezing compartment of a refrigerator is at $0^{\circ} \mathrm{C}$ and room temperature is $27.3^{\circ} \mathrm{C}$. Work done by the refrigerator to freeze $1 \mathrm{~g}$ of water at $0^{\circ} \mathrm{C}$ is $\left(\mathrm{L}_{\mathrm{ice}}=80 \mathrm{cal} \mathrm{g}^{-1}\right)$

148552 A Carnot engine works first between $200^{\circ} \mathrm{C}$ and $0^{\circ} \mathrm{C}$ and then between $0^{\circ} \mathrm{C}$ and $-200^{\circ} \mathrm{C}$. The ratio of its efficiency in the two cases is

148549 A diatomic ideal gas is used in Carnot's engine as working substance. During adiabatic expansion of the cycle, if the volume of the gas increases from $\mathrm{V}$ to $32 \mathrm{~V}$, then the efficiency of the engine is

148550 A reversible Carnot heat engine converts $\frac{1}{4}$ th of its input heat into work. When the temperature of the sink is reduced by $50 \mathrm{~K}$, its efficiency becomes $33 \frac{1}{3} \%$. The initial temperatures of the source and the sink respectively are

148551 Freezing compartment of a refrigerator is at $0^{\circ} \mathrm{C}$ and room temperature is $27.3^{\circ} \mathrm{C}$. Work done by the refrigerator to freeze $1 \mathrm{~g}$ of water at $0^{\circ} \mathrm{C}$ is $\left(\mathrm{L}_{\mathrm{ice}}=80 \mathrm{cal} \mathrm{g}^{-1}\right)$

148552 A Carnot engine works first between $200^{\circ} \mathrm{C}$ and $0^{\circ} \mathrm{C}$ and then between $0^{\circ} \mathrm{C}$ and $-200^{\circ} \mathrm{C}$. The ratio of its efficiency in the two cases is

148549 A diatomic ideal gas is used in Carnot's engine as working substance. During adiabatic expansion of the cycle, if the volume of the gas increases from $\mathrm{V}$ to $32 \mathrm{~V}$, then the efficiency of the engine is

148550 A reversible Carnot heat engine converts $\frac{1}{4}$ th of its input heat into work. When the temperature of the sink is reduced by $50 \mathrm{~K}$, its efficiency becomes $33 \frac{1}{3} \%$. The initial temperatures of the source and the sink respectively are

148551 Freezing compartment of a refrigerator is at $0^{\circ} \mathrm{C}$ and room temperature is $27.3^{\circ} \mathrm{C}$. Work done by the refrigerator to freeze $1 \mathrm{~g}$ of water at $0^{\circ} \mathrm{C}$ is $\left(\mathrm{L}_{\mathrm{ice}}=80 \mathrm{cal} \mathrm{g}^{-1}\right)$

148552 A Carnot engine works first between $200^{\circ} \mathrm{C}$ and $0^{\circ} \mathrm{C}$ and then between $0^{\circ} \mathrm{C}$ and $-200^{\circ} \mathrm{C}$. The ratio of its efficiency in the two cases is

148549 A diatomic ideal gas is used in Carnot's engine as working substance. During adiabatic expansion of the cycle, if the volume of the gas increases from $\mathrm{V}$ to $32 \mathrm{~V}$, then the efficiency of the engine is

148550 A reversible Carnot heat engine converts $\frac{1}{4}$ th of its input heat into work. When the temperature of the sink is reduced by $50 \mathrm{~K}$, its efficiency becomes $33 \frac{1}{3} \%$. The initial temperatures of the source and the sink respectively are

148551 Freezing compartment of a refrigerator is at $0^{\circ} \mathrm{C}$ and room temperature is $27.3^{\circ} \mathrm{C}$. Work done by the refrigerator to freeze $1 \mathrm{~g}$ of water at $0^{\circ} \mathrm{C}$ is $\left(\mathrm{L}_{\mathrm{ice}}=80 \mathrm{cal} \mathrm{g}^{-1}\right)$

148552 A Carnot engine works first between $200^{\circ} \mathrm{C}$ and $0^{\circ} \mathrm{C}$ and then between $0^{\circ} \mathrm{C}$ and $-200^{\circ} \mathrm{C}$. The ratio of its efficiency in the two cases is