Question

which one of the following is an endothermic process?1.ice melting 2.water freezing 3.a boiling soup 4.the reaction of HCl and NAOH,temperature increases

Answer 1

The process of ice melting is an endothermic process because it absorbs heat from the environment. Water boiling is also endothermic, while gasoline burning and ice forming are exothermic processes.

Step-by-step explanation:

The process of ice melting is an endothermic process. Heat is absorbed from the surroundings to break the intermolecular forces in ice, which is why ice melts at temperatures above 0°C under standard atmospheric pressure. This absorption of heat makes it endothermic.

For other examples:

• Water boiling is endothermic because it requires the addition of heat to change water from a liquid to a gas.
• Gasoline burning is exothermic as it releases heat during combustion.
• The formation of ice on a pond (freezing of water) is exothermic because heat is released into the surroundings as water turns into ice.

During endothermic processes, there is a net absorption of heat from the environment, which is often accompanied by a cooling effect. In contrast, exothermic reactions release energy, typically in the form of heat, causing the surroundings to become warmer.

Answer 2

From the above given choices :
melting is an endothermic process