Fill the blank -5
The Kelvin scale maintains the same …. as the Celsius scale.
degree size
The linear expansion can be defined by the following equation: … where …
Dl/l = a DT., DT= change in temperature, and a = linea expansion coefficient
The energy associated with the random, disordered molecular motion is referred to as ….
internal energy
The temperature at which the molecular motion ceases is referred to as the ….
absolute 0 temperature
If a person touches a hot object, s/he experiences collisions with the energetic molecules of that object, which may transfer enough internal energy to his finger to cause …
pain
The internal energy of gases is basically all in the form of … energy.
kinetic
Internal energy cannot be related to any type of molecular motion. That is why, it is important to use the words „….“ and „….“ when defining the internal energy of a body.
random; disorded
The temperature is a measure of the average …. energy of the disordered molecular motion.
kinetic
A gram of water and a gram of a metal which are at the same temperature have completely different …. energy
internal
Two objects which are at the same temperature are said to be in .…
thermal equilibrium
…. is the transfer of internal energy from an object of higher temperature to an object of lower temperature.
heating
Two standard reference points are used to calibrate a thermometer. These are the … point and … point of water.
freezing; boiling
Kelvin is one of the …. Units for temperature.
three
The lowest possible temperature a body can have is called …. temperature.
absolute 0
Water freezes at 273° on the …. scale.
kelvin
The first law of thermodynamics is essentially the application of the principle of …. to heat and internal energy.
conservation of energy
Heat may be defined as “… “ or as the energy transferred because of a temperature difference.
internal energy in transit
If the energy transferred to a gas as heat enables it to do work but does not raise its temperature then the process is called an ….. of the gas.
isothermal expansion
Linear expansion is referred to as an expansion in one …
dimension
The area expansion coefficient is about … the linear expansion coefficient.
double
When the temperature of the air in a balloon is reduced, the volume of the balloon will …
reduce
If two metals with different …. are bonded together in the form of a thin bimetallic strip, this strip can be used to measure temperature.
a (expansion) coefficient
Heat will not be transferred between two bodies that have the same …
temperature
The … of a substance is defined as the amount of heat required to increase the temperature of 1g of that substance by 1°C.
specific heat
An isobaric process occurs at constant ….
pressure
Heat can be measured in terms of the standard energy unit the ….
cal \ J
The rate of heat production is measured in … or …
J\s ; W
James Joule showed that both heat and work can produce the same change in the internal energy of a substance, thus establishing the principle of the …
conservation of energy
Let us consider a well-insulated system-container filled with air (Q=0). When the piston compresses the volume, the pressure and temperature must both …. .
increase
… is the most common symbol used for internal energy. G
U