Measurement and effects of heat

Formula for calculating amount of heat is?

• Q = mcT

• Q = m / cT

• Q = mc (T2 – T1)

• Q = mc / T2−T1

Which of the following effects of heat does a mercury thermometer work on?

• Expansion of gases.

• Expansion of liquids.

• Change of state.

• Anomalous behaviour.

One Calorie is equal to

• 4.18 J

• 1.48 J

• 8.14 J

• 4.81 J

.....................is used to measure the heat content of an object

.............. is the amount of heat required to increase the temperature of unit mass of the substance through one degree.

Heat flows from an object at higher temperature to an object at lower temperature.

• True

• False

The average kinetic energy of atoms in a hot object is less than the average kinetic energy of atoms in a cold object.

• True

• False

Conduction of heat takes place only in .................

• Solids

• Liquids

• Gases

• Air

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down
• They would stop moving
• They would speed up
• There would be no effect

If the temperature of water changes by 10°C on giving 300 cal of heat, what is the mass of water?

• 30 gm

• 3000 gm

• 300 gm

• 3 gm