PHYSICAL CHEMISTRY 2011 CLB 10703

UNIVERSITI KUALA LUMPURMALAYSIAN INSTITUTE OF CHEMICAL & BIOENGINEERING TECHNOLOGY

PHYSICAL CHEMISTRY(CLB 10703)

Tutorial 1

1. Give the definition of matter and explain the three states of matter.

2. Write the SI unit for the following quantity.a) Force b) Pressure c) Temperature d) Energy / heat e) Volume f) Timeg) Mass h) Speed i) Mass density

3. State the Boyle’s Law, Charles’ Law and Avogadro’s Law. Give the equation for each of the law.

4. A sample of oxygen gas occupies a volume of 56.2 cm3 at 25°C and 1 atm pressure. Determine the volume if the pressure is decreased to 0.75 atm at constant temperature.

5. A sample of ammonium gas occupies 250 cm3 at 30°C. Determine the temperature when the volume was doubled under the same pressure.

6. Calculate the volume (at S.T.P.) occupied by the following gases.a) 2.87 g of nitrogen gasb) 0.53 mol of hydrogen gas

7. Explain how the Ideal Gas Equation could be derived from the combination of the Gas Laws.

8. The volume of a sample of gas at 25°C and 101 kPa is 4.45 dm3. Calculate the volume at 58°C and 225 kPa?

9. A container of volume 35 dm3 contains 0.84 mol of oxygen and 2.2 mol of carbon dioxide under a total pressure of 115 kPa. Calculate the partial pressure of each gas in the mixture.

10. About 2.50 dm3 of gas A at a pressure of 7.5 atm and 1.20 dm3 of gas B at a pressure of 2.5 atm were forced into a container of 0.75 dm3 capacity. Calculate the total pressure occupied in the container, assuming the temperature remains constant throughout.

11. State the van der Waals equation for real gas. Why this equation is important for real gas and not for ideal gas?

12. Identify whether a neon gas weighed 35.5 g can exert a pressure of 2.24 atm or not in a 1.75 L vessel at 38°C if it behaved as a perfect gas. Calculate the pressure that would be exerted if it behaved as a Van der Waals gas. (Given : Ne = 20.18 g/mol, a = 0.205 atm L2/mol2, b = 1.67 x 10-2 L/mol)

13. Suppose that 10.0 mol of ethane gas, C2H6 is confined to 4.860 dm ' at 27°C. Predict the pressure exerted by the ethane by using

(a) the perfect gas equation (b) the Van der Waals equation

HK/CLB 10703/2012