Endothermic

The video explains endothermic processes, focusing on the melting and evaporation of water. It also discusses how dissolving ammonium nitrate in water is used in chemical cold packs, highlighting the practical application of these reactions.

What is the role of surroundings in thermodynamics?

• They are always at a constant temperature.

• They exchange energy with the system.

• They are irrelevant to the system.

• They are the system being studied.

Which of the following is an example of an endothermic process?

• Condensation of steam

• Freezing of water

• Melting of ice

• Burning of wood

What happens to the temperature of the surroundings during an endothermic process?

• It increases.

• It fluctuates randomly.

• It decreases.

• It remains constant.

Why is ammonium nitrate used in chemical cold packs?

• It absorbs heat when dissolved.

• It is non-toxic.

• It releases heat when dissolved.

• It is a cheap material.

What is a common application of dissolving ammonium nitrate in water?

• Fireworks

• Cold packs

• Heating pads

• Cooking