alalla temperature.
me an instrument which is used to measure temperature. What kind of temperature scale
9
es it use?
Heating and cooling
When a solid melts, the particles which make up the solid turn into liquid.
When a liquid boils, the particles which make up the liquid turn into gas.
When a gas condenses, the particles which make up the gas become liquid
.
orrect the following statement:
general, matter expands when it gains heat. This is because the particles in the matter
well' in size when they gain energy.
hy is it dangerous to heat a completely sealed container of a liquid or gas?
/rite down three problems caused by expansion or contraction. How are these problems
vercome?
errect the following misconceptions:
methods of heat transfer.
nlace in a vacuum? Why?
Answers
Answer:
1. At melting point of solid, the solids are converted into liquids. During melting the kinetic energy of the particles of the solids increases due to increase in temperature. Due to this the intermolecular forces of attraction in solids decreases and thus solids are converted into liquids
2. BOILING. When a liquid is heated, the particles are given more energy. They start to move faster and further apart. At a certain temperature, the particles break free of one another and the liquid turns to gas
3. Condensation is the process in which molecules of a gas slow down, come together, and form a liquid. When gas molecules transfer their energy to something cooler, they slow down and their attractions cause them to bond to become a liquid. Making water vapor colder increases the rate of condensationExplanation: