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

ConceptChemical Thermodynamics and Energetic Concepts of System

Question

Distinguish between isothermal process and adiabatic process.

Solution

 No Isothermal process Adiabatic process 1 The temperature of system remainsconstant (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 systemremains 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 absorbingheat from  surroundings Expansion takes place by utilizing internal energy of the system 8 Heat supplied is used only for doingwork. 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 heatinto internal energy of the system. 10 Fusion of ice. Expansion of gas in vacuum.
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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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