Caloriemeter

What is the purpose of a calorimeter?

• To measure the volume of an object

• To measure the weight of an object

• To measure the heat content of an object

• To measure the temperature of an object

Answer explanation

Using this equipment, we can measure the heat produced or absorbed in a physical or chemical process

Why is a calorimeter made of copper?

• Copper is a good conductor of heat

• Copper is a poor conductor of heat

• Copper is easily available

• Copper is cheap

Mark the stirrer in the diagram.

Answer explanation

A calorimeter has two vessels, an inner and an outer one. This way, no heat can be transferred from the inner to the outer vessel or from the outer to the inner vessel. Thus, the inner vessel is thermally isolated from the surroundings. The inner vessel is made of copper. A thermometer for measuring the temperature and a stirrer for stirring the liquid in the calorimeter are fitted in it.

If a cold object is placed in the calorimeter, the cold object will receive heat from the water, causing its temperature to increase while the water and calorimeter lose heat and their temperature decreases. The cold object will ___ heat.

When a hot object is placed in water, heat is exchanged between the hot object, water, and the calorimeter until they reach the same temperature. The process is known as heat ___.

What is the specific heat of water in cal/(gm°C)?

• 0.58

• 0.21

• 1.0

• 3.42

If two objects have different temperatures when they come in contact, heat will flow from the warmer object to the cooler one UNTIL ____________

• one reaches a temperature of zero

• they both have an equal temperature

• one runs out of energy

What is the SI unit of heat?

• Joule

• Watt

• Newton

• Ohm

What is the formula to calculate heat transfer?

• Q = mcΔT

• Q = PT

• Q = mv

• Q = Fd

Answer explanation

The formula to calculate heat transfer (qq) is given by:

q=mcΔTq=mcΔT

Where:

• q represents the amount of heat transferred (in Joules, J)

• m is the mass of the substance undergoing a temperature change (in grams, g)

• cc is the specific heat capacity of the substance (in Joules per gram per degree Celsius, J/g°C)

• ΔT is the change in temperature (in degrees Celsius, °C)

What is the difference between specific heat and heat capacity?

• Specific heat is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius, while heat capacity is the amount of heat required to raise the temperature of an entire object by 1 degree Celsius

• Specific heat is the amount of heat required to raise the temperature of an entire object by 1 degree Celsius, while heat capacity is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius

• Specific heat and heat capacity are the same thing

• There is no difference between specific heat and heat capacity