How much energy does a freezer need to remove from 1.2 kg of water at 20°C to make ice at -6°C? [Sp

Question

How much energy does a freezer need to remove from 1.2 kg of water at 20°C to make ice at -6°C?

[Specific heat capacity of water = 4200 Jkg⁻¹K⁻¹, Specific heat capacity of ice = 2100 Jkg⁻¹K⁻¹]

[Latent heat of fusion of ice = 334000 Jkg⁻¹]

Answer 1

How much energy does a freezer need to remove from 1.2 kg of water at 20°C to make ice at -6°C?

[Specific heat capacity of water = 4200 Jkg⁻¹K⁻¹, Specific heat capacity of ice = 2100 Jkg⁻¹K⁻¹]

[Latent heat of fusion of ice = 334000 Jkg⁻¹]

428,720 J
605,920 J
426,480
516,720 J ✓

Explanation

This physics concept involves analyzing the given values and applying relevant formulas. Work through the problem step by step using known equations and constants.

Identify what quantity needs to be found and which formula connects the given information to the answer. Substitute the values carefully, paying attention to units.

Check that your calculated answer matches one of the options provided. Understanding the underlying principle helps verify the solution makes physical sense.