Question

Какое количество теплоты нужно для того что бы переплавить 50кг стали при температуре плавления.

Answer 1

Q=Лямда • m
Q=50 кг • 82000Дж/кг=4100000 Дж= 4,1 МДж

Answer 2

Q=лямбда*m=50*0.84*10^5=4,2МДж

Answer 3

Calculating Heat Required to Melt 50kg of Steel

To calculate the amount of heat required to melt 50kg of steel at its melting temperature, we can use the formula:

Q = m * L

Where: - Q is the heat required (in joules) - m is the mass of the substance (in kg) - L is the specific latent heat of fusion for the substance (in J/kg)

Specific Latent Heat of Fusion for Steel

The specific latent heat of fusion for steel is approximately 250 kJ/kg (kilojoules per kilogram).

Calculation

Using the given mass of steel (m = 50kg) and the specific latent heat of fusion for steel (L = 250 kJ/kg), we can calculate the heat required (Q) as follows:

Q = 50kg * 250 kJ/kg

Result

Calculating the above expression gives us the amount of heat required to melt 50kg of steel at its melting temperature.