Chapter 6 Chem
A gas sample has a volume of 500 mL at 20 C. At what celsius ten would the gas has a volume half as large?
-127 C
Convert a temp of 210 k into celcius
-63.0 degrees
A pressure is recorded as 622 torr. What is this pressure in atm?
0.818
Which of the following is not a standard condition (STP) for gas measurements?
1.00 torr
A gas sample collected at 350 C and a pressure of 710 torr has a volume of 200 ml. The temp and pressure are changed, and the gas is compressed to 150 mL. The new temp is 40 C, what is the new pressure?
1.27 atm
A balloon has a volume of 5 liters of 22 C and 1.00 atmosphere of pressure. What will be the balloons volume in liters if the pressure is increased to 3.00 atmospheres at 22 C?
1.67
How many balloons can you fill from a 10 liter tank of helium you purchased? The tank has an initial pressure of 1500 psi. Also, you know that, when filled to the recommended 25 psi, each balloon will hold a volume of 5.5 L
107
2500 liters of oxygen gas is produced at 1.00 atm of pressure. It is to be compressed and stored in a 20.0 liter cylinder. If temperature is constant, calculate the pressure of the oxygen in the cylinder.
125 atm
A 5.00 liter gas sample is collected at a temp and pressure of 27.0 C and 1.20 atm. It is desired to transfer the gas to a 3 liter container at a pressure of 1 atm. What must be the temp of the gas in the 3 liter container?
150 K
What volume of ammonia gas, NH3, in liters is produced at STP by the complete reaction of 100 g of nitrogen, N2, with excess hydrogen? N2 + 3H2 = 2NH3
160
Using d = m/v, what is the volume of a solid that has a density of 3.14g/cm3 and has a mass of 7.04 grams?
2.23 cm3
What volume in liters is occupied by 8.22 g of SO2 gas confined at a pressure of 1200 torr at 75 C? (hint: R= 0.0821 liter atm/mol K)
2.32
Given the following: heat of fusion ice = 80 cal/g; specific heat of ice = .480 cal/g; and specific heat of water - 1 cal/g. Calculate the amount of heat required to melt 30 g of ice at 0 C.
2.40 kcal
A sample of gas collected at 21.0 C and a pressure of 660 torr has a volume of 1.83 liters. What volume in liters will the gas occupy at 38.0 C under a pressure of 500 torr?
2.56
Near room temp air has a density of 1.18 x 10^-3 g/mL. What volume will 30.77 g of air occupy?
2.62 x 10^4 mL
The heat fusion for zinc chloride is 40.4 calories per gram at the melting point of 275 C. How much heat is required to melt 500 g of zinc chloride at its melting point?
20.2 kcal
Ethylene dichloride is an effective cooling agent when allowed to evaporate. The heat of vaporization is 85.3 calories per gram. How much heat could be removed from the skin if 2.70 grams of ethylene dichloride were sprayed on and allowed to evaporate?
230 cal
Convert a temperature of 45 degrees celcius into kelvin
318 k
A 5 liter sample of gas measured at 27 C and 1.25 atm of pressure has a mass of 10.13 g. What is the molecular weight of the gas in u?
39.9
The specific heat of ice is .48 cal/g C. How much heat will it take to raise the temp of 10 g of ice from -30 C to -20 C?
48 cal
A 3.2 liter sample of gas is at 40 C and 1.0 atmosphere of pressure. If the temp decreases to 20 C and the pressure decreases to 0.60 atmospheres, what is the new volume in liters?
5.0
What pressure will 3.20 mol of N2 gas exert if confined in a 15 L container at 100 C?
6.53 atm
Calculate the kinetic energy of a .500 g particles traveling at 5.50
7.56 g cm2/s2
Calculate the volume in liters of 3.5 moles of gas at STP.
78.4
You have a patient that is currently experiencing some discomfort after eating a large quantity of beans. The pain is being caused by the build up of gas pressure in the large intestines. If you were able to put a pressure gauge in to the patient, which of the following would be a reasonable pressure that you might observe?
860 torr
What is the total pressure of a gaseous mixture that contains three gases with partial pressures of .845 atm, 120 torr, and 210 mm Hg?
972 torr
A mixture of helium, argon, and krypton is made and stored in a cylinder at a total pressure of 2.80 atm. The partial pressure of helium is 900 torr, and that of argon is 250 too. What is the partial pressure of krypton in the mixture?
978 torr
Which individual developed a relationship showing that PV = k?
Dalton
T or F, The addition of heat causes all substances to change from a solid to a liquid gas
False
T or F, the specific heat of ice is the amount of heat required to melt a specified weight to liquid water
False
Water has an unusually low specific heat.
False
Which of the following gases is least likely to behave ideally?
HCl
Which of the following gases would diffuse about one third as fast?
HCl
Which of the following pairs of gases would diffuse at essentially the same rate?
N2O and CO2
T or F, Polar liquids would normally have higher heats of vaporization than non polar liquids.
True
T or F, Pure substances in the gaseous state contain more energy than in the liquid state.
True
T or F, The expansion of mercury in a thermometer is an endothermic reaction
True
Which of the following would be an example of potential energy?
a new lithium battery
Which of the following specific temps is defined in terms of vapor pressure?
boiling point
In terms of boiling point, what is the effect of moving water to a point 1500 meters higher than the starting point?
boiling point will decrease
When a liquid sample is taken from sea level to a higher elevation, what happens to the external (atmospheric) pressure on the liquid and the boiling point of the liquid?
both decrease
Consider the figure below which shows the compression phase of a piston in your cars engine. This is an example of which gas law?
boyles
The vapor pressure of a liquid...
is equal to one atmosphere at the normal boiling point
The temperature of a liquid is decreased. What happens to the vapor pressure of the liquid as a result?
it decreases
Two objects are moving with the same velocity, but one has twice the kinetic energy of the other. How does the mass of the object with higher kinetic energy compare to the other objects mass?
it is larger by a factor of 2
How does kinetic energy of a particle change if the particles velocity is increased by a factor of 3?
kinetic energy increases by a factor of 9
As a healthy individual you have a blood pressure of 117 over 65. What are the units associated with blood pressure?
mm Hg
High density is characteristics of which state of matter?
more than one response is correct
Potential energy resulting from the attraction of particles...
more than one response is correct
Small compressibility is a characteristic of which state of matter?
more than one response is correct
Which of the following influence the vapor pressure of liquids?
more than one response is correct
Which of the following pressure units is largest?
one atm
Cohesive forces in matter are related to?
potential energy from particle attractions
Inhaling volatile materials has result in serious health effects. Which of the following substances has been used for inhalant abuse?
propane cooking gas
Which of the following correctly arranges the physical states of matter, in order of increasing energy of the particles (lowest to highest)?
s<l<g
Definite shape is a characteristic of which state of matter
solid
The direct change from the solid state to the vapor state is called?
sublimation
Which of the following physical properties would be impossible to determine for a material in the gas state?
surface tension
What property of a liquid such as mercury is used in a liquid in glass thermometer?
thermal expansion
The heat of fusion of water is 80. What are the units associated?
cal/g
In which of the following is an exothermic process?
condensation
A gas sample is collected in a balloon. What happens to the density of the gas sample as the sample is heated?
decreases
Increasing the pressure on a gas at constant temp does what?
decreases
The force resulting from particle motion is referred to as ____________.
distuptive
Overtime a latex balloon will lose its shape and buoyancy. Which process can be used to explain why this occurs?
effusion
