Question

200г. водяного пара ,взятого при температуре 100°С перевели в воде температуры 20°С.Какое количество теплоты преданно окружающей среде?

Answer 1

Calculation of Heat Transferred to the Surroundings

To calculate the amount of heat transferred to the surroundings when 200g of steam at 100°C is converted to water at 20°C, we can use the formula:

Q = m * c * ΔT

Where: - Q is the heat transferred to the surroundings - m is the mass of the substance (in this case, water) - c is the specific heat capacity of the substance - ΔT is the change in temperature

In this case, the mass of the water is 200g, the specific heat capacity of water is approximately 4.18 J/g°C, and the change in temperature is 100°C - 20°C = 80°C.

Plugging in these values into the formula, we get:

Q = 200g * 4.18 J/g°C * 80°C

Calculating this, we find that the amount of heat transferred to the surroundings is approximately 66,880 J (or 66.88 kJ).

Please note that the specific heat capacity of water can vary slightly depending on the temperature range considered. The value used here is an approximate average.