true false - 5
In the liquid state, the intermolecular attractive forces between molecules can be neglected
F
At room temperature, objects may appear to be completely at rest, however, on a microscopic level, their molecules are in ceaseless, rapid motion which contributes to the objects ́ internal energy.
T
The molecules of a speeding bullet are in motion, but the energy associated with that motion is not classified as internal energy.
T
The internal energy of an ideal gas increases when heated from 0°C to 5°C
T
In the liquid state, the molecular motion is restricted to back-and- forth vibration around an equilibrium position, analogously to the mass on a spring motion.
F
The temperature of an ideal gas is a measure of the average kinetic energy of the randomly moving molecules.
T
The macroscopic motion of objects is classified as ordered motion, since there are a large number of molecules that move together in a certain direction.
T
The terms „hot“ and „cold“ are imprecise and can be misleading when judged by our senses.
T
Two bodies with the same temperature may store different amounts of heat.
T
Energy transfer by conduction may be regarded as the transfer of energy by collisions of more energetic molecules of the colder object with the molecules of the hotter object.
F
Suppose there are two objects with the same temperature. Regardless of how much internal energy they have, there will be no transfer of internal energy between them.
T
In the presence of friction, not all of the work done on a system is converted into mechanical energy.
T
The freezing point of a substance depends on the atmospheric pressure.
F
The internal energy of an object may be changed by performing work on it or by transferring heat to it.
T
Fractional expansion of a solid is defined as L/dL is the change in length.
F
The thermal expansion of liquids is characterized by a volume expansion coefficient
T
Most common thermometers function on the basis of thermal expansion or generation of electrical signals.
T
When heat is added to an object, the change in its temperature depends upon its mass and its specific heat.
T
The temperature is not directly proportional to the internal energy.
T
According to the first law of thermodynamics, the sum of the energy transferred to or from a system as heat and the energy transferred to or from a system by work is equivalent to the entropy change.
F
There are different types of thermometers: liquid expansion thermometers, bimetallic strip thermometers and constant pressure gas thermometers.
F
The British physicist James Joule found that about 41.86 J were equal to 1 calorie.
F
As the temperature of a substance increases, its volume tends to increase due to thermal equilibrium.
T
The constant volume gas thermometer functions on the basis of the ideal gas law. When the pressure is constant, the volume of an enclosed gas is directly proportional to the Kelvin temperature.
F
The bimetallic strip thermometer can also be used to measure temperatures below 0°C.
T
One gram of water and 1g of copper at the same temperature have different amounts of internal energy.
T
The volume expansion coefficients for liquids are generally smaller than those for solids.
F
Temperature is usually measured by allowing a substance to come to thermal equilibrium with a thermometer.
T
The liquid expansion thermometers require no electric power to function.
T
If an object is made of one type of material, no distortion occurs during its thermal expansion.
T