What is quantity of heat required to melt down completely 1kg of ice at 30 degree celsius

To determine the quantity of heat required to melt 1 kg of ice at 30 degrees Celsius, we can use the formula:

Q = m * L

Where:
Q is the quantity of heat
m is the mass of the substance (in this case, 1 kg)
L is the specific latent heat of fusion for ice

The specific latent heat of fusion for ice is the amount of heat energy required to change 1 kg of ice at its melting point to water at the same temperature. For ice, this value is 334,000 J/kg.

Now we can substitute the values into the formula:

Q = 1 kg * 334,000 J/kg
Q = 334,000 J

Therefore, the quantity of heat required to completely melt down 1 kg of ice at 30 degrees Celsius is 334,000 Joules.