Module 4 Quiz

molecular motion in a gas is the minimum possible at

0 K

A heat engine absorbs heat at 127°C and exhausts heat at 77°C. Its maximum efficiency is

13 percent

a container holds 1 g of air at atmospheric pressure. When an additional gram of air is pumped into the container and there is no change in temperature, the new pressure is

2 atm

Fifty kJ of heat is added to a 10-kg piece of lead at its melting point of 330°C and 2 kg of lead melts. The heat of fusion of lead is

25 kJ/kg

the pressure on 100 liters of helium is increased from 100 kPa to 400 kPa. The new volume of the helium is

25 liters

the density of air is 1.3 kg/m^3. The air in a room 5 m long, 4 m wide, and 2.5m high has a mass of

65 kg

Ethanol boils at 172°F. The Celsius equivalent of this temperature is

78°C

the pressure at the bottom of a barrel filed with liquid does not depend on the

area of the liquid surface

which of the following quantities is independent of the size and shape of an object composed of a given material?

density

molecules are, in general, farthest apart from one another in

gases

heat transfer by conduction occurs

in liquids, solids, and gases

When a liquid freezes to become a solid,

it gives off heat

the temperature of a gas sample in a rigid container is reduced. The pressure the gas exerts on the container walls decreases because

its molecules have lower average speeds and so strike the walls less often with less momentum

when heat is added to a body of matter, the resulting temperature increase does not depend upon

its shape

the first law of thermodynamics is the same as the

law of conservation of energy

A thermometer calibrated in the Celsius scale and a thermometer calibrated in the Fahrenheit scale are used to measure the same temperature. The numerical reading on the Fahrenheit thermometer

may be smaller or larger than that on the Celsius thermometer

the pressure on the bottom of an object inside a liquid is

more than the pressure on its top

a refrigerator

removes heat from a region and carries it elsewhere

the specific heat of ice is 2.1 kJ/kg °C. When 50 kJ of heat is removed from 2 kg of ice initially at -5°C, the final temperature of the ice is

-17°C

at which of the following Celsius temperatures will a Fahrenheit thermometer show the same reading in degrees?

-40 C