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