Related Questions
What is the correct answer?
4
In a working refrigerator, the value of COP is always
What is the correct answer?
4
An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to
What is the correct answer?
4
__________ decreases during adiabatic throttling of a perfect gas.
What is the correct answer?
4
Gibbs free energy (G) is represented by, G = H - TS, whereas Helmholtz free energy, (A) is given by, A = E - TS. Which of the following is the Gibbs-Helmholtz equation?
A. [∂(G/T)/∂T] = - (H/T2)
What is the correct answer?
4
At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.
What is the correct answer?
4
Heating of water under atmospheric pressure is an __________ process.
What is the correct answer?
4
Reduced pressure of a gas is the ratio of its
A. Pressure to critical pressure
B. Critical pressure to pressure
C. Pressure to pseudocritical pressure
D. Pseudocritical pressure to pressure
What is the correct answer?
4
Adiabatic compression of a saturated water vapour makes it
What is the correct answer?
4
Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?
What is the correct answer?
4
Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of
What is the correct answer?
4
__________ increases with increase in pressure.
A. The melting point of wax
B. The boiling point of a liquid
What is the correct answer?
4
A gas performs the maximum work, when it expands
What is the correct answer?
4
Which of the following is not an intensive property?
What is the correct answer?
4
Which of the following is an extensive property of a system?
What is the correct answer?
4
Throttling process is a/an __________ process.
A. Reversible and isothermal
B. Irreversible and constant enthalpy
C. Reversible and constant entropy
D. Reversible and constant enthalpy
What is the correct answer?
4
__________ functions are exemplified by heat and work.
What is the correct answer?
4
The main feature of Carnot refrigeration cycle is that, it
A. Does not need the addition of external work for its functioning
B. Transfers heat from high temperature to low temperature
C. Accomplishes the reverse effect of the heat engine
What is the correct answer?
4
Work done may be calculated by the expression ∫ p dA for __________ processes.
What is the correct answer?
4
A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1 is
What is the correct answer?
4
With increase in temperature, the atomic heat capacities of all solid elements
What is the correct answer?
4
Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.
D. Decreases logarithmically
What is the correct answer?
4
In the equation, PVn = constant, if the value of n = ± ∞, then it represents a reversible __________ process.
What is the correct answer?
4
At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is
What is the correct answer?
4
At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the
A. Third law of thermodynamics
B. Second law of thermodynamics
What is the correct answer?
4
High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:
What is the correct answer?
4
The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
What is the correct answer?
4
Ideal gas law is applicable at
What is the correct answer?
4
On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will
D. Increase in summer and will decrease in winter
What is the correct answer?
4
Which of the following is not an intensive property?
What is the correct answer?
4
In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible __________ process.