Exam 14: Thermodynamics and Properties of Substances

In case of a heat pump, second law efficiency is given as

The internal energy of saturated water at the triple point is

Which of the following is a property of a pure substance?

A chip dissipates 2 kJ of electric work and rejects it as heat transfer from its surface which is at 50°C to 25°C air. How much entropy is generated in the chip?

When a liquid and its vapour are in equilibrium at a certain pressure and temperature, then which of the following is required to identify the saturation state.

Second law efficiency can also be given as

At critical pressure, value of Hg-Hf is

The superheat or degree of superheat is given by

The isotherm passing through the critical point is called the critical isotherm.

For a power plant, second law efficiency can be given by desired output(W) / available energy(Wmax).

Saturated liquid or the saturated vapour has how many independent variables?

The entropy of saturated water is chosen to be zero at triple point.

Which of the following curves meet at triple point?

The equation which forms the basis of the Mollier diagram is

Which of the following exists in a p-V diagram for water?

The properties of water are arranged in the steam tables as functions of

If data are required for intermediate temperatures or pressures, linear interpolation is normally accurate.

Second law efficiency is defined as

Both first law efficiency and second law efficiency indicate how effectively the input has been converted into the product.

The slope of the fusion curve for water is