Question

Помогите пожалуйста 2. Сколько энергии требуется затратить, чтобы расплавить свинец массой 200 г, взятый при температуре его плавления?

Answer 1

Q=0.2*327.5=65.5 джоулей

Answer 2

Calculating the Energy Required to Melt Lead

To calculate the energy required to melt lead, we can use the formula:

Q = m * L

Where: - Q = energy required (in joules) - m = mass of the substance (in grams) - L = specific latent heat of fusion for the substance (in J/g)

Given: - m = 200 g (mass of lead) - Specific latent heat of fusion for lead is approximately 23 J/g.

Using the formula, we can calculate the energy required to melt the lead:

Q = 200 g * 23 J/g

Q ≈ 4600 J

So, approximately 4600 joules of energy are required to melt 200 grams of lead at its melting temperature.

Additional Information

It's important to note that the specific latent heat of fusion represents the amount of energy required to change a substance from a solid to a liquid at its melting point. This energy is used to overcome the forces holding the particles together in the solid state, allowing them to move more freely in the liquid state