Thermodynamics ...

A gas does $$4.5\ J$$ of external work during adiabatic expansion. If its temperature falls by $$2\ K$$, then its internal energy will be:

A sound wave passing through an ideal gas at NTP produces a pressure change of $$0.001$$ $$dyne/cm^2$$ during adiabatic compression. The corresponding change in temperature $$(\gamma=1.5$$ for the gas and atmospheric pressure is $$1.013\times 10^6$$ dyne$$/cm^2$$) is:

An ideal monoatomic gas at $$\displaystyle { 27 }^{ \circ  }C$$ is compressed adiabatically to $$8/27$$ times of its present volume. The increase in temperature of the gas is:

Which of the following is true in the case of an adiabatic process, where $$\gamma ={ { C }_{ p } }/{ { C }_{ v } }$$ ?

An insulated cylindrical vessel is filled with an insulated piston of negligible weight and negligible thickness at the mid point of the vessel. The cylinder contains a gas at $$\displaystyle { 0 }^{ \circ  }C$$. When the gas is heated to $$\displaystyle { 100 }^{ \circ  }C$$, the piston moves through a length of $$5\ cm$$. Length of the cylindrical vessel in $$cm$$ is:

In a process, 20 joules of heat is added to an ideal gas and the gas does 12 joules of work. Which of the following is true about the internal energy of the gas during this process?

The idealized P-V diagram above shows a complete cycle through compression and expansion of a gas. The questions below relate to the processes within the cycle.
Which letter shows isothermal compression?

In a winter season, a heat pump is used to warm the room. A heat pump works 60 J on the pump while it absorbs 90 J of heat. How much heat is delivered to the house?

The idealized P-V diagram above shows a complete cycle through compression and expansion of a gas. The questions below relate to the processes within the cycle.
Which letter shows an adiabatic expansion?