Thermodynamics ...

If the slope for isotherm is $$X$$ and the slope for adiabatic is $$Y$$ then 

When gas in a vessel expands, its thermal energy decreases. The process involved is

An ideal gas at $${ 27 }^{ \circ  }C$$ is compressed adiabatically to $$\dfrac { 8 }{ 27 } $$ of its original volume. If $$\gamma =\dfrac { 5 }{ 3 } $$, then the rise in temperature is 

An ideal gas of volume $$V$$ and pressure $$P$$ expands isothermally to volume $$16V$$ and then compressed adiabatically to volume $$V$$. The final pressure of gas is $$[\gamma  = 1.5]$$ 

For an adiabatic expansion of a perfect gas, the value of $$\dfrac {\triangle P}{ P }$$ is equal to

Helium at $$27^0C$$ has a volume of $$8$$ litres. It is suddenly compressed to a volume of $$1$$ litre. The temperature of the gas will be [$$\gamma= 5/3$$]

Three Carnot engines operate in series between a heat source at a temperature $$T_{1}$$ and a heat sink at temperature $$T_{4}$$ (see figure). There are two other reservoirs at temperature $$T_{2}$$, and $$T_{3}$$, as shown, with $$T_{2} > T_{2} > T_{3} > T_{4}$$. The three engines are equally efficient if__?

Choose the incorrect statement from the following.

Which of the following is incorrect?

The slope of indicator curve in adiabatic change relative to volume axis is -