(R=0.0821Ltm/mol.K) 1. A 200-mL sample of nitrogen gas is collected at 45.0-C and a presstre of 610 torr. What volume will the gas occupy at 0C and 760 torr? 2. A 4.50-L gas sample is collected at temperature and pressure of 27 " C and 1.20atm. The gas is transferred to a3,00-L container at a pressure of 1.00atm. What must the Celshus temperature of the gas in the 3.00-L container be? 3. What mininum pressure would a 250mL aerosol at 20C can have to withstand it were to contain 2.00L of gas measured at 700 torr and a temperature of 77C ? 1 4. Calculate the volume occupied by 25.50g of ammonia at a pressure of 2.75atm and a temperature of 55.0CC. 5. Suppose 12.0g of dry ioe (solid CO:) was placed in an empty 400mL steel cylender. What pressure would develop if all the solid sublimed at temperature of 35.0 5. Suppose 12.0g of dry ioe (solid CO2 ) was placed in an empty 400mL sted cylinder. What pressure would develop if all the solid sublimed at temperature of 35.0C ? 6. Calculate the temperatures (in Celsius) of nitrogen gas sample that has a volume of 2.25L and a pressure of 300 torr and contains 0.500 mole of nitrogen 7. The heat of vaporization of water is 540 cal/g. How many calories are required to vaporize 5.00kg of boiling water? 2 8. Calculate the heat absotbed when 100g of water at 100C is converted to steam at 150C. 9. How much beat can be removed by 2.00kg of Freon as it vaporizes inside the coils of refrigerator? The heat of vaporization of Freon is 38.6 cal/g 10. Calculate the amount of heat in calories needed to change the temperature of the following: a. 250.00g of lead from 87C to 20C(s=0.031cal/gC) b. 35.00g of oxygen gas from 200C to 95C(sm0.22cal/g4C) c. 170.0g of mercury liquid from 108C to 345C (s =0.033cal/gC) 3 11. Draw \&s label the heating curve and calculate the total amount of heat needed to change 500g of ice at - 10C to steam at 110C (Refer to your note or text for the various constants needed for the calculation)