Chemical Engineering Thermodynamics - Study Mode
[#141] Claussius-Clayperon equation gives accurate result, when the
Correct Answer
(D) All of the above
[#142] Joule-Thomson experiment is
Correct Answer
(D) Both B & C
Explanation
Solution: Joule -Thomson experiment is usually carried out at adiabatic conditions and the fluid enthalpy remains same during the process since during the process the internal energy and pressure energy will change in such a way that the enthalpy remains constant.
[#143] If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the
Correct Answer
(D) Both B and C
Explanation
Solution: By first law of thermodynamics we can say $$delta Q = dU + delta W$$ $$ Rightarrow $$ xa0for the internal energy and work to be same in magnitude we can say that heat transfer has to be zero $$delta Q = 0$$ So the process is adiabatic and given the system is ideal gas and its internal energy is decreasing so, we can say that temperature decreases since the internal energy of a substance is solely dependent of temperature.
[#144] The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.
Correct Answer
(B) Triple
Explanation
Solution: The point at which all the three physical phases existing in equilibrium is nothing but triple point and here the degree of freedom becomes zero for a pure substance.
[#145] The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of
Correct Answer
(B) T and P