Question

При охлаждении чугунного утюга массой 2 кг при температуре 20 градусов выделилось количество

Answer 1

 Дано:
m- 2кг
t2-20C
Q-1512000Дж
с-540 Дж\кг*С
t2-?
Решение:
Q- cm(t1-12)=> t2= Q\cmt2=> 1512000 Дж \ 540 Дж/кг*С *2кг * 20С = 70С 

Answer 2

Calculating Heat Release When Cooling a Cast Iron Iron

To calculate the heat release when cooling a cast iron iron, we can use the formula:

Q = mcΔT

Where: - Q = heat released - m = mass of the object - c = specific heat capacity of the material - ΔT = change in temperature

Given: - m = 2 kg - c (specific heat capacity of cast iron) = 0.46 kJ/kg°C - Initial temperature = 20°C - Final temperature = unknown

We need the final temperature to calculate the heat release.

Finding the Final Temperature

To find the final temperature, we can use the formula:

Q = mcΔT

Rearranging the formula to solve for ΔT:

ΔT = Q / mc

Substituting the given values: ΔT = (20 - t) Q = 2 * 0.46 * (20 - t)

Conclusion

The amount of heat released when cooling a 2 kg cast iron iron from 20°C to a final temperature can be calculated using the formula Q = mcΔT. To find the final temperature, we can use the formula ΔT = Q / mc.