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Published byEdmund Gregory Oliver Modified over 9 years ago
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Tutorial 1 By Miss Anis Atikah Ahmad
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Question 1 Calculate C P of 586 g of CH 4 (g) at 2000K and 1 bar if C P,m of CH 4 at 2000 K and 1 bar is 94.4 Jmol -1 K -1
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Question 1 Recall Find n; Thus; Value is not given
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Question 2 Adam and Anthony found that, for air at 28°C and pressures in the range 1 to 40 atm. Calculate for air at: a)28°C and 1.00 atm b)28°C and 2.00 atm
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Question 2 Given;, Find can be written as; Assuming air as ideal gas, Thus; Value is not given Derive to another equation
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Question 2 (a) Extract out the data & substitute in the equation: (b) Doubling P;
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Question 3 One mole of He gas essentially independent of temperature expands reversibly from 24.6 L and 300 K to 49.2 L. Calculate the final pressure and the temperature if the expansion is: (a) isothermal (b) adiabatic Sketch these two processes on a P-V diagram
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Question 3 Extract out the information: (a)Isothermal process; ΔT=0 Thus ;
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(b) Adiabatic process; q=0 For reversible adiabatic process; where Recall: Question 3
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(b) Calculate pressure at initial state first since it is not given; Calculate pressure at final state: Question 3
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(b) Calculate temperature at final state; Question 3
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(c)
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Question 4 One mole of liquid water at 30°C is adiabatically compressed, P increasing from 1.00 to 10.00 atm. Since liquids and solids are rather incompressible, it is fairly good approximation to take V as unchanged for this process. Calculate q, ΔU, and ΔH for this process.
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Question 4 Extract out all the information: The process is adiabatic, ΔV=0 Since the process is adiabatic, Calculate work: 0
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Question 4 Calculate ΔH
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Question 4 For water
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Question 4
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