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प्रश्न
What is an isothermal process?
उत्तर
A process in which change in pressure and volume takes place at a constant temperature is called an isothermal process or isothermal change. For such a system, ΔT = 0. An isothermal process is a constant temperature process.
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संबंधित प्रश्न
The internal energy of an ideal gas decreases by the same amount as the work done by the system.
(a) The process must be adiabatic.
b) The process must be isothermal.
(c) The process must be isobaric.
(d) The temperature must decrease.
Calculate the change in internal energy of a gas kept in a rigid container when 100 J of heat is supplied to it.
When a system is taken through the process abc shown in figure, 80 J of heat is absorbed by the system and 30 J of work is done by it. If the system does 10 J of work during the process adc, how much heat flows into it during the process?
A gas is enclosed in a cylindrical vessel fitted with a frictionless piston. The gas is slowly heated for some time. During the process, 10 J of heat is supplied and the piston is found to move out 10 cm. Find the increase in the internal energy of the gas. The area of cross section of the cylinder = 4 cm2 and the atmospheric pressure = 100 kPa.
Consider the cyclic process ABCA, shown in figure, performed on a sample of 2.0 mol of an ideal gas. A total of 1200 J of heat is withdrawn from the sample in the process. Find the work done by the gas during the part BC.
Calculate the increase in the internal energy of 10 g of water when it is heated from 0°C to 100°C and converted into steam at 100 kPa. The density of steam = 0.6 kg m−3. Specific heat capacity of water = 4200 J kg−1 °C−1 and the latent heat of vaporization of water = 2.25 × 10 6J kg−1.
Choose the correct option.
Which of the following is an example of the first law of thermodynamics?
Define an isolated system.
Which of the following are TRUE for a reversible isothermal process?
(i) ∆U = 0
(ii) ∆H = 0
(iii) Q = W
(iv) ∆T = 0
If an average person jogs, hse produces 14.5 × 103 cal/min. This is removed by the evaporation of sweat. The amount of sweat evaporated per minute (assuming 1 kg requires 580 × 103 cal for evaparation) is ______.
An ideal gas undergoes cyclic process ABCDA as shown in given P-V diagram (figure). The amount of work done by the gas is ______.
Three copper blocks of masses M1, M2 and M3 kg respectively are brought into thermal contact till they reach equilibrium. Before contact, they were at T1, T2, T3 (T1 > T2 > T3). Assuming there is no heat loss to the surroundings, the equilibrium temprature T is (s is specific heat of copper)
Write the mathematical equation for the first law of thermodynamics for:
Adiabatic process
The amount of heat needed to raise the temperature of 4 moles of a rigid diatomic gas from 0°C to 50°C when no work is done is ______.
(R is the universal gas constant.)
In the reported figure, heat energy absorbed by a system in going through a cyclic process is ______ πJ.
Mathematical equation of first law of thermodynamics for isochoric process is ______.
Which among the following equations represents the first law of thermodynamics under isobaric conditions?
A soap bubble in vacuum has a radius of 3 cm and another soap bubble in vacuum has a radius of 4 cm. If the two bubbles coalesce under isothermal condition, then the radius of the new bubble is ______.
What work will be done, when 3 moles of an ideal gas are compressed to half the initial volume at a constant temperature of 300 K?
An ideal gas (γ = 1.5) is expanded adiabatically. How many times has the gas had to be expanded to reduce the root mean square velocity of molecules two times?
Derive an expression for the work done during an isothermal process.
If the adiabatic ratio for a gas is 5/3, find the molar specific heat capacity of the gas at (i) constant volume (ii) constant pressure.
In an adiabatic process, W = ______.
What is Isobaric process?
Show that the heat absorbed at constant pressure is equal to the change in enthalpy of the system.
Obtain an expression for the workdone by a gas in an isothermal process.
Write a short note on isobar.
