1. The Eiffel Tower (the figure) is built of wrought iron approximately 300 m tall. Assume the coefficient of thermal expansion of wrought iron is 1210^61/degree C

• Estimate how much its height changes between January (average temperature of 2 degreeC) and July (average temperature of 25 degree C). Ignore the angles of the iron beams and treat the tower as a vertical beam.

2. If 2.66m^3 of a gas initially at STP is placed under a pressure of 3.37atm , the temperature of the gas rises to 33.0 degreeC.

• What is the volume?

3.If 16.92 mol of helium gas is at 11.9 degree C and a gauge pressure of 0.375 atm .

• Calculate the volume of the helium gas under these conditions.
• calculate the temperature if the gas is compressed to precisely half the volume at a gauge pressure of 1.22 atm .

4. A storage tank contains 21.6 kg of nitrogen (N2)at an absolute pressure of 4.05 atm .

• What will the pressure be if the nitrogen is replaced by an equal mass of CO2?

5. The lowest pressure attainable using the best available vacuum techniques is about

10^12N/m^2

• At such a pressure, how many molecules are there percm^3 at 4 degreeC?

6. Calculate the rms speed of helium atoms near the surface of the Sun at a temperature of about 6300K.

7. A gas is at 26 degreeC.

• To what temperature must it be raised to triple the rms speed of its molecules?

8. What is the air pressure at a place where water boils at 40 degree C?

9. If the humidity in a room of volume 400 m^3 at 25 degree C is 60 % , what mass of water can still evaporate from an open pan?

10. A thermometer tells you that you have a fever of 37.5 degree C.

• What is this in Fahrenheit?