chemistry HW

Chemistry 115

Activity 9b

Gas Laws

Name:____________________

1. For each of the following pairs of pressure measurements, indicate whether the first list measurement is larger than, equal to, or smaller than the second listed measurement.

a. 0.998 atm and 762 mm Hg

b. 29.92 psi and 29.92 in. Hg

c. 17.8 psi and 545 kPa

2. A sample of oxygen gas occupies a volume of 2.00 L at 27 oC and 2.00 atm pressure. What volume, in L, will this sample of oxygen gas occupy at the same temperature but at 453 mm Hg?

3. A sample of nitrogen dioxide gas has a volume of 1.50 L at 23 oC. What volume, in L, will this gas occupy at 123 oC, if the pressure is held constant?

4. At constant volume, the temperature of a sample of sulfur dioxide gas is decreased from 97 oC to 27 oC. What was the original pressure of the gas, in atmospheres, if this action decreases the sample pressure to 3.00 atm?

5. Calculate the volume of 85 g of chlorine gas at 73 oC and 1.54 atm.

6. A mixture of 25.0 g of NO and an excess of O2 reacts according to the balanced equation

___NO(g) + ___O2(g) ___NO2(g)

How many liters of NO2, at STP, are produced?

7. Ammonium nitrate, NH4NO3, can decompose explosively when heated to a high temperature according to the equation

___NH4NO3(s) ___N2(g) + ___H2O(g) + ___O2(g)

If 100.0 g of ammonium nitrate decomposes at 450 oC, how many liters of gaseous products would be formed? (Assume atmospheric pressure is 1.00 atm)