If ∆U and ∆W represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the following is true?
Options
(a) ∆U = – ∆W, […]
The internal energy change in a system that has absorbed 2 kcals of heat and done 500J of work is:
Options
(a) 6400 J (b) 5400 J (c) 7900 J (d) 8900 J
In thermodynamics processes which of the following statements is not true?
Options
(a) In an isochoric process pressure the temperature constant (b) In an isothermal process the temperature remains constant (c) In an […]
If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cyclic process, then:
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(a) W = 0 (b) Q = W […]
A liquid boils when its vapour pressure equals
Options
(a) The atmospheric pressure (b) Pressure of 76.0 cm column of mercury (c) The critical pressure (d) The dew point of the surroundings
Correct […]
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62⁰C, its efficiency is doubled. Temperature of the source is
Options
(a) 37⁰C (b) 62⁰C (c) 99⁰C (d) […]
Amout of heat required to raise the temperature of a body through 1 K is called its
Options
(a) Water equivalent (b) Thermal capacity (c) Entropy (d) Specific heat
Correct Answer:
Thermal capacity
In a given process on an ideal gas, dW=0 and dQ
Slope of PV and V for an isobaric process will be
Options
(a) negative (b) zero (c) positive (d) nRT
Correct Answer:
positive
Explanation:
No explanation available. Be the first to write the […]
Volume of gas becomes four times if temperature becomes
Options
(a) Four times at constant pressure (b) One fourth at constant pressure (c) Two times at constant pressure (d) Half at constant pressure
Correct […]
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