Question

Science - IX
17
Q. 7. Why is ice at 273 K more effective in cooling than water at
the same temperature ?​

Answer 1

Required Answer:-

• When ice abosrbs water, it performs fusion to change into water.
• But the temperature at which ice gets converted into water remains constant while latent heat is being exchanged.
• Hence, Ice at 273K will absorb both latent heat and thermal energy from the body.
• Carrying out such amount of heat from the body will make it cooler in less time as water used for cooling because water will only absorb thermal energy$.$

Keywords:

Latent heat: It is the heat needed by a substance to change its state by overcoming the Interparticular spaces of attraction.

• When ice changes into water, the heat needed is latent heat of fusion.
• And when it changes to gas, the heat needed is latent heat of vaporisation.

Answer 2

Answer:

Required Answer :-

Ice at 273 Kelvin is more effective than water at same temperature which means 273 Kelvin because the water may absorb heat energy to receive the natural temperature. Therefore, Ice at 273 K more effective in cooling than water at the same temperature.

★ More To Know  :-

• Kelvin is the SI unit of Temperature.
• Mostly we use celsius and Fahrenheit to measure temperature.
• SI unit of celsius is C
• SI unit of fahrenheit is F