Question

Какое количество теплоты отдает кирпичная печь массой 0,5 тонн, остывая от 70 градусов до 20 градусов ? Удельная теплоемкость кирпича 880 Дж кг градусов

Answer 1

Дано:
m=0,5 тонн = 500 кг
t1 = 70°С
t2= 20°С
с = 880 Дж/кг °C
Найти - Q
Решение:
Q = cm(t2-t1)
Q= 880Дж/кг °C * 500кг(20-70)= - 22 000 000 = - 22МДж
Ответ: Q= - 22МДж

Answer 2

Calculation of Heat Released by a Brick Stove

To calculate the amount of heat released by a brick stove, we can use the formula:

Q = m * c * ΔT

Where: - Q is the heat released (in joules) - m is the mass of the stove (in kilograms) - c is the specific heat capacity of the brick (in joules per kilogram per degree Celsius) - ΔT is the change in temperature (in degrees Celsius)

Given the following values: - Mass of the stove (m): 0.5 ton = 500 kg - Specific heat capacity of the brick (c): 880 J/kg°C - Change in temperature (ΔT): 70°C - 20°C = 50°C

We can substitute these values into the formula to calculate the heat released:

Q = 500 kg * 880 J/kg°C * 50°C

Calculating this expression gives us the amount of heat released by the brick stove.

Please note that the specific heat capacity of the brick may vary depending on its composition and other factors. The value of 880 J/kg°C is an approximate value commonly used for bricks.

Let's calculate the result.