The pressure in a constant-volume gas thermometer is 0.700 atm at 100°C and 0.512 atm at 0°C. (a) What is the temperature when the pressure is 0.0450 atm? °C (b) What is the pressure at 425°C?

The pressure in a constant-volume gas thermometer is 0.700 atm at 100°C and 0.512 atm at 0°C.
(a) What is the temperature when the pressure is 0.0450 atm? °C (b) What is the pressure at 425°C? atm
2.–/2 pointsSerCP9 10.P.029.soln.My Notes |
One mole of oxygen gas is at a pressure of 6.35 atm and a temperature of 23.5°C.
(a) If the gas is heated at constant volume until the pressure triples, what is the final temperature? °C (b) If the gas is heated so that both the pressure and volume are doubled, what is the final temperature? °C
3.–/2 pointsSerCP9 10.P.031.My Notes |
(a) An ideal gas occupies a volume of 2.0 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. molecules (b) If the pressure of the 2.0-cm3 volume is reduced to 1.0 × 10−11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container? mol
4.–/1 pointsSerCP9 10.P.039.WI.soln.My Notes |
What is the average kinetic energy of a molecule of oxygen at a temperature of 240 K? J
5.–/2 pointsSerCP9 10.P.043.My Notes |
At what temperature would the rms speed of a chlorine-35 atom equal the following speeds? (Note: The mass of a chlorine-35 atom is 5.810 http://www.webassign.net/images/multiply.gif 10-26kg.)
(a) the escape speed from Earth, 1.12 http://www.webassign.net/images/multiply.gif 104 m/s K (b) the escape speed from the Moon, 2.37 http://www.webassign.net/images/multiply.gif 103 m/s K
6.–/2 pointsSerCP9 10.P.054.My Notes |
A vertical cylinder of cross sectional area A is fitted with a tight-fitting, frictionless piston of mass m (figure below).
http://www.webassign.net/sercp9/10-p-054.gif
(a) If n moles of an ideal gas are in the cylinder at a temperature of T, use Newton’s second law for equilibrium to show that the height h at which the piston is in equilibrium under its own weight is given by
h =
nRT
mg + P0A
where P0 is atmospheric pressure. (Do this on paper. Your instructor may ask you to turn in this work.) (b) Is the pressure inside the cylinder less than, equal to, or greater than atmospheric pressure?
less than equal to greater than
(c) If the gas in the cylinder is warmed, how would the answer for h be affected?
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7.–/1 pointsSerCP9 11.P.004.My Notes |
An aluminum rod is 18.5 cm long at 20°C and has a mass of 350 g. If 10,500 J of energy is added to the rod by heat, what is the change in length of the rod? mm
8.–/4 pointsSerCP9 11.P.019.My Notes |
An aluminum calorimeter with a mass of 100 g contains 250 g of water. The calorimeter and water are in thermal equilibrium at 10.0°C. Two metallic blocks are placed into the water. One is a 49.1-g piece of iron at 80.0°C. The other has a mass of 324.5 g and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20.0°C. (Use any necessary data on specific heats found in this table.)
(a) Determine the specific heat of the unknown sample. J/kg · °C (b) Using the data in the table, can you make a positive identification of the unknown material? Can you identify a possible material? The unknown material be (c) Explain your answers for part (b).
This answer has not been graded yet.
9.–/1 pointsSerCP9 11.P.026.My Notes |
A 51-g ice cube at 0°C is heated until 43 g has become water at 100°C and 8.0 g has become steam at 100°C. How much energy was added to accomplish the transformation? J
10.–/3 pointsSerCP9 11.P.037.My Notes |
A 1.50-g lead bullet at 30.0°C is fired at a speed of 2.00 http://www.webassign.net/images/multiply.gif 102 m/s into a large, fixed block of ice at 0°C, in which it becomes embedded.
(a) Describe the energy transformations that occur as the bullet is cooled.
This answer has not been graded yet.
What is the final temperature of the bullet? °C (b) What quantity of ice melts? g