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  3. b in an experiment 2 mol of liquid benzene is...

Question: b in an experiment 2 mol of liquid benzene is...

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(b) In an experiment, 2 mol of liquid benzene is heated by doing work on it with a rotating paddle wheel. The heat capacity Cp of benzene is 133.1 Jmol- K-1. The paddle wheel does 626 J of work and the temperature rise is measured to be 2K. How much heat has been lost? A more accurate thermometer reveals that the true temperature rise is 1.95 K What is the revised value of the amount of heat lost? (5 marks) (c) Define the following terms: adiabatic, isothermal, equilibrium, reversible process, and heat capacity. (5 marks) Figure Q2: A two-step process. (d) Figure Q2 above shows two processes. Process AB is isothermal, and process BC is adiabatic. The pressure at B is 1.0 × 105Pa and the volume at B is 0.1 m. You may assume γ-C,/C, 1.4. i) If the volume at A is 0.08 m3, what is the pressure at A? ii) If the volume at C is 0.11 m3, what is the pressure at C? (6 marks)
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