What is the SI unit of heat?

Joule (J)

Which of the following is a factor that affects the quantity of heat required to raise the temperature of a body? A) Color of the body B) Nature of the material C) Shape of the body D) Size of the container

B) Nature of the material

True or False: The heat capacity of a body is the amount of heat energy required to raise its temperature by 2°C.

False. The heat capacity is the amount of heat energy required to raise its temperature by 1°C or 1 K.

Riddle: I measure the heat exchanged but don't change my temperature. What am I?

Calorimeter

The specific heat capacity of a substance is defined as the heat capacity per unit ______.

Mass

What does the principle of calorimetry state when a hot body is mixed with a cold body?

Heat energy lost by the hot body equals heat energy gained by the cold body.

Which method is suitable for measuring the specific heat capacity of good conductors like copper and aluminum?

Electrical Method

True or False: The melting point of ice is 0°C.

True

What is the effect of impurities on the melting point of a substance?

The melting point decreases with the presence of impurities.

What term describes the heat energy required to raise the temperature of 1 g of water through 1°C?

Calorie

Which of the following statements is true about boiling? A) All liquids contract on boiling B) The boiling point decreases with an increase in pressure C) The boiling point increases with the addition of impurities D) All liquids remain at constant volume during boiling

C) The boiling point increases with the addition of impurities

Fill in the blank: The process of change from one state to another at a constant temperature is called ______.

Change of phase

Riddle: I change from solid to liquid without a temperature change, but my heat is hidden. What am I?

Latent heat

What is the symbol for specific latent heat?

L

True or False: The specific latent heat of fusion is the heat energy required to convert a unit mass of a substance from liquid to solid.

False. It is the heat energy required to convert a unit mass from solid to liquid.

What is the unit of specific heat capacity?

J kg⁻¹ K⁻¹ or J kg⁻¹ °C⁻¹

Which of the following affects the boiling point of a liquid? A) Color B) Pressure C) Shape D) Size

B) Pressure

Fill in the blank: The heat energy exchanged during the change of phase is known as ______.

Latent heat

What happens to the temperature of ice when it melts?

The temperature remains constant at 0°C.

Riddle: I am a measure of how much heat is needed to raise the temperature of a body by 1°C, but I depend on the mass. What am I?

Heat capacity