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Chapter: 05. Heat

⁠
The standard unit of heat in the SI system is the _ _ _ _ _ _ _ _ _ _ _ _ _ _.
joule
One calorie is defined as the amount of heat energy required to raise the temperature of 1 g of water by _ _ _ _ _ _ _ _ _ _ _ _ _ _.
1°C
When two bodies having unequal temperatures are brought together, transfer of heat takes place until they reach a state of _ _ _ _ _ _ _ _ _ _ _ _ _ _.
thermal equilibrium
A clinical thermometer is graduated from 35°C to _ _ _ _ _ _ _ _ _ _ _ _ _ _.
42°C
The slight bend in the capillary tube of a clinical thermometer just above the bulb is called a _ _ _ _ _ _ _ _ _ _ _ _ _ _.
constriction
On the Fahrenheit scale, the interval between the freezing point and the boiling point of water is divided into _ _ _ _ _ _ _ _ _ _ _ _ _ _ parts.
180
The lowest possible temperature on the Kelvin scale is _ _ _ _ _ _ _ _ _ _ _ _ _ _.
0 K
The process in which a solid changes to the liquid state by absorbing heat at a fixed temperature is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.
melting
The process of conversion of a solid directly into the vapour state on heating is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.
sublimation
The increase in the length of a solid upon heating is known as _ _ _ _ _ _ _ _ _ _ _ _ _ _ expansion.
linear
Water shows unusual behavior by contracting on being heated from 0°C to _ _ _ _ _ _ _ _ _ _ _ _ _ _.
4°C
The best metallic conductor of heat is _ _ _ _ _ _ _ _ _ _ _ _ _ _.
silver
Handles of cooking vessels are made of insulators such as plastic, wood, or _ _ _ _ _ _ _ _ _ _ _ _ _ _.
ebonite
The mode of heat transfer in fluids where heat is always transferred vertically upwards is _ _ _ _ _ _ _ _ _ _ _ _ _ _.
convection
During the day, the wind that blows from the sea towards the land is called a _ _ _ _ _ _ _ _ _ _ _ _ _ _.
sea breeze
Air conditioners are installed near the ceiling because cool air is _ _ _ _ _ _ _ _ _ _ _ _ _ _ and descends downwards.
denser
Heat energy transmitted through radiation is called _ _ _ _ _ _ _ _ _ _ _ _ _ _ energy.
radiant
White and shining surfaces are bad absorbers of heat but are good _ _ _ _ _ _ _ _ _ _ _ _ _ _ of heat.
reflectors
The vacuum between the double walls of a thermos flask prevents heat transfer by conduction and _ _ _ _ _ _ _ _ _ _ _ _ _ _.
convection
The Scottish physicist and chemist who designed the double-walled vacuum flask was _ _ _ _ _ _ _ _ _ _ _ _ _ _.
Sir James Dewar
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