Question

железный утюг массой 3 кг при включении в электрическую сеть нагрелся от 20 до 120 градусов. какое количество теплоты получил утюг

Answer 1

100 градусов 120-20=100

Answer 2

Calculating Heat Absorbed by the Iron

To calculate the heat absorbed by the iron, we can use the formula:

Q = mcΔT

Where: - Q = heat absorbed - m = mass of the iron (3 kg) - c = specific heat capacity of iron - ΔT = change in temperature (120°C - 20°C)

First, let's find the specific heat capacity of iron.

Specific Heat Capacity of Iron

The specific heat capacity of iron is approximately 0.45 J/g°C.

Calculating Heat Absorbed

Using the formula Q = mcΔT:

Q = 3000g * 0.45 J/g°C * (120°C - 20°C)

Q = 3000g * 0.45 J/g°C * 100°C

Q = 135000 J

So, the iron absorbed approximately 135,000 joules of heat when it heated up from 20°C to 120°C.