Question

какое количество энергии потребуется чтобы 400г льда при температуре 0 градусов превратилось в пар при температуре 100 градусов

Answer 1

Q=Q1+Q2

Q1=mc(t2-t1)

Q2=rm

Q=m(c(t2-t1)+r)

t2-температура кипения воды 100 градусов

t1- начальная темпераьура 0 градусов

r-удельная теплота парооброзования

m-масса льда 0,4кг

c-удельная теплоемкость воды 4200 Дж/кг*градус по Ц

Answer 2

Calculating the Energy Required to Convert Ice to Steam

To calculate the energy required to convert 400g of ice at 0 degrees Celsius to steam at 100 degrees Celsius, we can use the formula:

Q = m * L

Where: - Q = energy required - m = mass of the substance - L = specific latent heat

First, we need to calculate the energy required to raise the temperature of the ice from 0 degrees Celsius to 100 degrees Celsius, and then the energy required to change the state of the ice to steam.

Energy Required to Raise the Temperature of Ice

The energy required to raise the temperature of a substance can be calculated using the formula:

Q = m * c * ΔT

Where: - Q = energy required - m = mass of the substance - c = specific heat capacity - ΔT = change in temperature

The specific heat capacity of ice is 2.09 J/g°C, and the change in temperature is 100°C.

Using the formula, we can calculate the energy required to raise the temperature of the ice: Q1 = 400g * 2.09 J/g°C * 100°C

Q1 = 83,600 J

Energy Required for Phase Change

The energy required for a phase change can be calculated using the formula:

Q = m * L

Where: - Q = energy required - m = mass of the substance - L = specific latent heat

The specific latent heat of fusion for ice is 334 J/g, and the specific latent heat of vaporization for water is 2260 J/g.

Using the formula, we can calculate the energy required for the phase change: Q2 = 400g * 334 J/g + 400g * 2260 J/g

Q2 = 133,600 J + 904,000 J Q2 = 1,037,600 J

Total Energy Required

The total energy required is the sum of the energy required to raise the temperature and the energy required for the phase change: Total Energy = Q1 + Q2 Total Energy = 83,600 J + 1,037,600 J Total Energy = 1,121,200 J

Therefore, the total energy required to convert 400g of ice at 0 degrees Celsius to steam at 100 degrees Celsius is 1,121,200 Joules.