Q. Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

View solution

Q. First law of thermodynamics deals with the

View solution

Q. 1m³ of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

View solution

Q. For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is

View solution

Q. A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is Φᵢ yᵢ P = Yᵢ xᵢ fᵢ° where, Φ is a vapor fugacity component, Yᵢ is the liquid activity co-efficient and fᵢ° is the fugacity of the pure component i. The Kᵢ value (Yᵢ = Kᵢ xᵢ) is therefore, in general a function of

View solution

Q. Standard temperature and pressure (S.T.P.) is

View solution

Q. Normal temperature and pressure (N.T.P.) corresponds to

View solution

Q. Which of the following is affected by the temperature ?

View solution

Q. Work done may be calculated by the expression ꭍp dA for __________ processes.

View solution

Q. The molar excess Gibbs free energy, gᴱ, for a binary liquid mixture at T and P is given by, (gᴱ/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

View solution

Q. The adiabatic throttling process of a perfect gas is one of constant enthalpy

View solution

Q. For spontaneous changes in an isolated system (S = entropy)

View solution

Q. The second law of thermodynamics states that

View solution

Q. Internal energy of an ideal gas

View solution

Q. A refrigerator works on the principle of __________ law of thermodynamics.

View solution

Q. Pick out the wrong statement.

View solution

Q. Pick out the wrong statement.

View solution

Q. Choose the condition that must be specified in order to liquify CO₂ (triple point for CO₂ is - 57°C and 5.2 atm).

View solution

Q. If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in

View solution

Q. One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is

View solution