HSC Science (Computer Science) 12th Board ExamMaharashtra State Board
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Distinguish Between Isothermal Process and Adiabatic Process. - HSC Science (Computer Science) 12th Board Exam - Chemistry

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Question

Distinguish between isothermal process and adiabatic process.

Solution

No Isothermal process Adiabatic process
1 The temperature of system remains
constant (ΔT = 0).
The temperature of system changes i.e.
increases or decreases (ΔT ≠0).
2 System can exchange heat with the surroundings (q ≠ 0). System cannot exchange heat with the surroundings (q = 0).
3 The internal energy of the system
remains constant (ΔU = 0).
The internal energy of the system changes
(ΔU ≠ 0).
4 System is not thermally isolated from its  surroundings.  Hence, open or closed system is required. System is thermally isolated from its surroundings.  Hence, isolated  system is required.
5 In this ΔU = 0, hence q = -W. In this q = 0, hence ΔU = W.
6 Enthalpy remains constant (ΔH = 0). Enthalpy changes in this process (ΔH ≠ 0).
7 Expansion takes place by absorbing
heat from  surroundings
Expansion takes place by utilizing internal energy of the system
8 Heat supplied is used only for doing
work.
Work done is only at the cost of internal energy.
9 Compression takes place by  losing heat to the surroundings.  Compression takes place by adding heat
into internal energy of the system.
10 Fusion of ice. Expansion of gas in vacuum.
  Is there an error in this question or solution?

APPEARS IN

 2016-2017 (July) (with solutions)
Question 4.2 | 7.00 marks

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Solution Distinguish Between Isothermal Process and Adiabatic Process. Concept: Chemical Thermodynamics and Energetic - Concepts of System.
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