Question

Имеется 7 кг жидкого золота при температуре 1500 градусов цельсия. Сколько тепла выделится в результате получения из него твёрдого золота при 10 градусов цельсия?

Answer 1

130дж_ kg*C *7 (100-10)=81900дж-1500*C =80400дж=80,4кдж

Answer 2

Calculating Heat Release from Liquid Gold to Solid Gold

To calculate the heat release when converting 7 kg of liquid gold at 1500 degrees Celsius to solid gold at 10 degrees Celsius, we can use the formula:

Q = mcΔT

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

First, we need to find the specific heat capacity of gold and then use it in the formula to calculate the heat released.

Specific Heat Capacity of Gold

The specific heat capacity of gold is approximately 0.129 J/g°C.

Calculating Heat Release

Using the formula Q = mcΔT, we can calculate the heat release: - m = 7000 g (since 1 kg = 1000 g) - c = 0.129 J/g°C - ΔT = (1500 - 10) = 1490°C

Plugging these values into the formula: Q = 7000g * 0.129 J/g°C * 1490°C

Calculating the result: Q ≈ 1,124,430 J

So, approximately 1,124,430 joules of heat will be released during the conversion of 7 kg of liquid gold at 1500 degrees Celsius to solid gold at 10 degrees Celsius.