TABLE 13-3 Saturated Vapor Pressure of Water Saturated Vapor Pressure Тemp- erature (°C) (= mm-Hg) (= N/m³) torr Ра - 50 0.030 4.0 - 10 1.95 2.60 x 102 6.11 х 10? 8.72 x 102 4.58 6.54 10 9.21 1.23 x 103 1.71 × 103 2.33 x 103 15 12.8 20 17.5 25 23.8 3.17 х 103 4.24 x 103 7.37 x 103 30 31.8 40 55.3 50 92.5 1.23 x 104 60 149 1.99 х 104 70* 234 3.12 х 104 80 355 4.73 x 104 90 526 7.01 x 104 100* 760 1.01 × 105 1.99 × 105 4.76 × 105 120 1489 150 3570 Boiling point on summit of Mt. Everest. * Boiling point at sea level.

(a) Suppose a meter Stick made of steel and one made of invar (an alloy of iron and nickel) are the same length at 0C. What is their difference in length at 22.0C ? (b) Repeat the calculation for two 30.0mlong surveyor's tapes.

In the ideal gas law, pressure is ___ proportional to volume. (5.6)

Review. While you arc on a trip to Europe, you must purchase hazelnut chocolate bars for your grandmother. Eating just one square each day, she makes each large bar last for one and one-third months. Mow many bars will constitute a years supply for her?

. On a winter day, the air temperature is — 15°C, and the humidity is 0,001 kg/m3. (a) What is the relative humidity? (b) When this air is brought inside a building, it is heated to 20°C. If the humidity isn't changed, what is the relative humidity inside the building?

Give an example in which density is used to identify the substance composing an object. Would information in addition to average density be needed to identify the substances in an object composed of more than one material?

Which of the assumptions below is not made in the kinetic theory of gases? (a) The number of molecules is very large. (b) The molecules obey Newtons laws of motion. (c) The forces between molecules are long range. (d) The gas is a pure substance. (e) The average separation between molecules is large compared to their dimensions. (f) of (his account are correct statements necessary for a clear and complete explanation? (ii) Which are correct statements that are not necessary to account for the higher thermometer reading? (iii) Which are incorrect statements?

Dry air is primarily composed of nitrogen. In a classroom demonstration, a physics instructor pours 2.00 L of liquid nitrogen into a beaker. After the nitrogen evaporates, how much volume does it occupy if its density is equal to that of the dry air at sea level? Liquid nitrogen has a density of 808 kg/m3.

A deepsea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea level, where dry air contains 20.9% oxygen and has a total pressure of 1.01105N/m2. (a) What is me partial pressure of oxygen at sea level? (b) If the diver breathes a gas mixture at a pressure of 2.00106N/m2, what percent oxygen should it be to have the same oxygen partial pressure as at sea level?

The density of air is 1.3 kg/m3 at sea level. From your knowledge of air pressure at ground level, estimate the height of the atmosphere. As a simplifying assumption, take the atmosphere to be of uniform density up to some height, after which the density rapidly falls to zero. (In reality, the density of the atmosphere decreases as we go up.) (This question is courtesy or Edward F. Redish. For more questions of this type, see http://www.physics.umd.edu/perg/.)