Volume Expansion

Q.

Define the coefficient of volume expansion.

Q.

Explain the following terms.

1. Fusion
2. Sublimation
3. Deposition
4. Thermal expansion
5. Coefficient of linear expansion
6. Coefficient of superficial expansion
7. Coefficient of cubical expansion

Q.

Each side of a box made of a metal sheet in cubic shape is $\mathrm{a}$ at room temperature$T$, the coefficient of linear expansion of the metal sheet is ‘$\alpha$’. The metal sheet is heated uniformly, by a small temperature$∆T$, so that its new temperature is$T+∆T$. Calculate the increase in the volume of the metal box:

1. $\frac{4}{3}{\mathrm{\pi a}}^3\mathrm{\alpha }∆\mathrm{T}$

2. $4{\mathrm{\pi a}}^3\mathrm{\alpha }∆\mathrm{T}$

3. $3a^3\alpha ∆T$

4. $4a^3\alpha ∆T$

Q.

Air contracts on heating.

1. True

2. False

Q.

Which among the following has largest thermal expansion?

1. metals

2. gases

3. liquids

4. alloys

Q.

Garima observed that when she left her tightly capped bottle full of water in open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it happened?

Q.

Bridges are mounted on ______ to allow for expansion and contraction.

Q. nt60 ml of mixture of CO and H2 were mixed with 40 ml of oxygen.Mixture was exploded and afer cooling it the volume was found to be 30 ml.Find the volume of CO and H2n nt(if all the volume is measured at STP)n

Q.

Which among the following factors does not influence the increase in volume of solids?

1. The final temperature

2. The constant temperature

3. The final volume of solid

4. The initial volume of solid

Q.

An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. The reason for this is

1. Linear expansion of air

2. Surface expansion of air

3. Volume expansion of air

4. None of the above

Q.

Thermal expansion of liquids is more than of solids.

1. True
2. False

Q. Which will expand the most, when heated to the same temperature?

1. Solids
2. All expand equally
3. Liquids
4. Gases

Q.

The increase in size of an object on heating is called _____________

Q.

Why is it not recommended to fill the bottle up to the top?

Q.

The apparent coefficient of expansion of a liquid when heated in a copper vessel is $C$ and when heated in a silver vessel is $S$. If $A$ is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver is -

1. $\frac{C+S-3A}{3}$

2. $\frac{C+3A-S}{3}$
3. $\frac{S+3A-C}{3}$

4. $\frac{C+S+3A}{3}$

Q.

Solids _______ on heating.

Q. Why heating a liquid causes increase in its volume?

Q.

By drawing a diagram show how you will collect dissolved air in water?

Q.

A gas occupies a volume of $300cc$ at ${27}^{\circ }$C and $620mm$ pressure. Find the volume of the gas at ${47}^{\circ }$C and $640mm$.

1. $450cc$

2. $260cc$

3. $390cc$

4. $310cc$

Q.

If we make a windmill on the moon will its blade ever move.Why?

Q.

Same volume of different liquids heated to same rise in temperature expand by different amounts.

1. True

2. False

Q. The coefficient of volume expansion of a solids is than the coefficient of linear expansion, for the same amount of heat.

1. greater
2. smaller
3. equal

Q.

when a van der waals gas undergoes free expanssion, then its temp.

a) decreases b) increases c) does not cange d) depends upon a nature of the gas

Q.

Define Linear expansion.

Q.

When the water gets converted into ice, its volume

1. decreases

2. increases

3. remains the same

4. initially decreases then increases

Q. The expansion in volume is called__________.

1. chemical expansion
2. cubical expansion
3. superficial expansion
4. linear expansion

Q.

When we heat kerosene oil in a container, its level rises. This is an example of

1. Volume expansion

2. Surface expansion

3. None of the above

4. Linear expansion

Q.

An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. The reason for this is

1. Linear expansion of air

2. Surface expansion of air

3. Volume expansion of air

4. None of the above

Q. Match the following types of materials with their respective expansions.

1. Iron rod
2. Linear
3. Copper sheet
4. Superficial
5. Gold box
6. Cubical

Q.

A cube of solid aluminium has a volume of $1m^3$at ${25}^{o}C$. What temperature change is required to produce a$100c{m}^3$ increase in the volume of the cube? [${\alpha }_{aluminium}=24\times {10}^{-6}{/}^{o}C$]