1. Tutorial 1 By Miss Anis Atikah Ahmad

2. 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

3. Question 1 Recall Find n; Thus; Value is not given

4. 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

5. Question 2 Given;, Find can be written as; Assuming air as ideal gas, Thus; Value is not given Derive to another equation

6. Question 2 (a) Extract out the data & substitute in the equation: (b) Doubling P;

7. 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

8. Question 3 Extract out the information: (a)Isothermal process; ΔT=0 Thus ;

9. (b) Adiabatic process; q=0 For reversible adiabatic process; where Recall: Question 3

10. (b) Calculate pressure at initial state first since it is not given; Calculate pressure at final state: Question 3

11. (b) Calculate temperature at final state; Question 3

12. (c)

13. 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.

14. Question 4 Extract out all the information: The process is adiabatic, ΔV=0 Since the process is adiabatic, Calculate work: 0

15. Question 4 Calculate ΔH

16. Question 4 For water

17. Question 4