When 1 kg of ice at 0⁰C melts to water at 0⁰C, the resulting change in its entropy
When 1 kg of ice at 0⁰C melts to water at 0⁰C, the resulting change in its entropy, taking latent heat of ice to be 80 cal/⁰C, is
Options
(a) 273 cal/K (b) […]
Questions
An ideal gas expands in such a manner that its pressure and volume can be related
An ideal gas expands in such a manner that its pressure and volume can be related by equation PV²=constant. During this process, the gas is
Options
(a) Heated (b) Cooled (c) Neither heated […]
If ∆U and ∆W represent the increase in internal energy and work done by the system
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
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?
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
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
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
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
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<0. Then for the gas
In a given process on an ideal gas, dW=0 and dQ