Physics 011

Chapter 13: Temperature and Kinetic Theory
A of PQ#13A

1.	To the nearest degree, what is absolute zero on the Celsius scale? Your answer: -273^oC
2.	To the nearest degree, if room temperature is 65^oF what is it in ^oC? The correct answer: 18 Multiply by 5/9 not 9/5. Review Section 13-2 in Giancoli.
3.	To the nearest degree, if it is hot outside at 100^oF what is it in ^oC? The correct answer: 38^oC Review Section 13-2 in Giancoli.
4.	What is -40^oC on the Fahrenheit scale? The correct answer: -40^oF You must add 32. Review Section 13-2 in Giancoli.
5.	To the nearest degree, what is absolute zero on the Fahrenheit scale? The correct answer: -460^oF You must add 32. Review Section 13-2 in Giancoli.
6.	The Rankine temperature scale bears the same relationship to the Fahrenheit scale as the Kelvin does to the Celsius. To the nearest degree, what is the freezing point in Rankine? The correct answer: 492 R This would be the boiling point. Review Section 13-7 in Giancoli.
7.	Temperature one is 10^oC and the second temperature is 30^oC. What is the average temperature in Kelvin? The correct answer: 293 K This is the lower temperature. Review Section 13-7 in Giancoli.
8.	What is the difference in C^o of the two temperatures, 35^oF and 62^oF? The correct answer: 15 C^o It is (5/9) of the difference in Fahrenheit. Review Section 13-2 in Giancoli.
9.	If the temperature difference in Celsius is 50^oC, what is the difference in Fahrenheit? The correct answer: 90 F^o Use (9/5) not (5/9). Review Section 13-2 in Giancoli.
10.	Which of the following temperatures is the highest? T1= 25^oC, T2= 72^oF, T3= 290 K, T4=510 R The correct answer: T1 This is 10.2^oC. Review Section 13-2 and 13-7 in Giancoli.
11.	The coefficient of thermal (linear) expansion,a, for aluminum is 25x10^-6(C^o)^-1. What is the change in length of a 1 meter bar if the temperature increases 30 C^o? The correct answer: .75 mm Review Section 13-4 in Giancoli.
12.	The coefficient of thermal expansion for iron is 12x10^-6(C^o)^-1. Which will expand more as temperature increases, a 2 meter iron bar or a 1 meter aluminum bar? The correct answer: aluminum Review Section 13-4 in Giancoli.
13.	A 1 meter diameter hole is cut into a aluminum sheet and the temperature is increased by 100 C^o. What is the new diameter of the hole? The correct answer: 1.0025 m It increases in size. Review Section 13-4 in Giancoli.
14.	An aluminum hollow metal sphere with a radius of 1 meter is exposed to a 200 F^o temperature increase. What is the ratio of the new volume to the old one? The correct answer: 1.008 Review Example 13-7 in Giancoli.
15.	The coefficient of volume expansion, beta, for Pyrex is 9x10^-6(C^o)^-1 and the coefficient of thermal expansion, alpha, for ethyl alcohol is 1100x10^-6(C^o)^-1. If the alcohol fills 50% of a Pyrex bottle what % will it occupy if the temperature is increased by 30 C^o? The correct answer: 52 % Review Example 13-7 in Giancoli.
16.	If 10 moles of a gas has a gauge pressure of 2 atm and a temperature of 200 K, what is its volume? The correct answer: .055 m^3 You must convert to absolute pressure in Pa. Review Example 13-8 in Giancoli.
17.	10 moles of a gas has a gauge pressure of 2 atm and a temperature of 200 K. If the temperature is doubled, what will be the new gauge pressure in atm? The correct answer: 5 atm This is the new absolute pressure. Review Example 13-13 in Giancoli.
18.	10 moles of a gas has a gauge pressure of 2 atm and a temperature of 200 K. If the volume of the gas is doubled and the gauge pressure dropped in half (1 atm), what is the new temperature? The correct answer: 267 K Review Section 13-9 in Giancoli.
19.	10 moles of a gas has a gauge pressure of 2 atm and a temperature of 200 K. How many molecules are there in the gas? Your answer: 6.02x10^24
20.	10 moles of a gas has a gauge pressure of 2 atm and a temperature of 200 K. If the molecules are hydrogen (atomic mass =1.008 u), what is the mass of the gas? The correct answer: 20.16 g A mole is based on grams. Review Section 13-10 in Giancoli.
21.	If temperature is measured in J/molecule (which is what it measures) instead of kelvin, what would be the value of k, Boltzmann's constant? The correct answer: 2/3 This is the normal value. Review Section 13-11 in Giancoli.
22.	If temperature is measured in J/molecule (which is what it measures) instead of kelvin and if we call the temperature scale the G scale what would be the temperature of the freezing point of water? Your answer: 5.65x10^-21 G
23.	What would be the conversion between the G scale (question 22) and the Celsius scale. Your answer: T(C)=((2/3)*T(G)/k)-273
24.	Six molecules have the speeds (in arbitrary units) of 2, 2, 4, 8, 4, 10. What is their average speed? The correct answer: 5 Add and divide by 6. Review Section 13-11 in Giancoli.
25.	Six molecules have the speeds (in arbitrary units) of 2, 2, 4, 8, 4, 10. What is the rms speed (to the nearest unit) of the molecules? The correct answer: 6 Take the average of the squared numbers and then tahe the squareroot. Review Section 13-11 in Giancoli.