Question

Какое количество теплоты требуется для нагревания 250 г воды на 5 градусов Цельсия

Answer 1

Дано:

Δt= 5 °C
m= 0,25 кг
c=4200 Дж /( кг · °C)
____________
Q - ?

Решение:

Q=cmΔt

Q=4200*0,25*5=5250 Дж

Ответ: Q = 5250 Дж

Answer 2

Calculating Heat Required to Heat 250g of Water by 5 Degrees Celsius

To calculate the amount of heat required to heat 250g of water by 5 degrees Celsius, we can use the formula:

Q = mcΔT

Where: - Q = heat energy (in joules) - m = mass of the substance (in grams) - c = specific heat capacity of the substance (in J/g°C) - ΔT = change in temperature (in °C)

Using the given values: - m = 250g - ΔT = 5°C

We need to find the specific heat capacity (c) of water to calculate the heat energy required.

Specific Heat Capacity of Water

The specific heat capacity of water is approximately 4.18 J/g°C.

Calculation

Using the formula Q = mcΔT and the specific heat capacity of water, we can calculate the heat energy required:

Q = (250g) * (4.18 J/g°C) * (5°C)

Q ≈ 5230 J

Therefore, the amount of heat required to heat 250g of water by 5 degrees Celsius is approximately 5230 joules.