Question

9. При полном сжигании 30грам Ca выделяется 480 кДж теплоты. Определяете тепловой эффект реакции. Ответ с объяснением выберу лучшим.Даю 10 баллов. Спасибо заранее❗

Answer 1

Ответ:

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Answer 2

Calculating the Heat Effect of the Reaction

To determine the heat effect of the reaction, we can use the formula:

Q = m * c * ΔT

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

In this case, we are given that the complete combustion of 30 grams of Ca releases 480 kJ of heat. We can use this information to calculate the heat effect of the reaction.

First, we need to convert the given heat release from kilojoules to joules: 480 kJ = 480,000 J

Next, we need to determine the specific heat capacity of calcium (Ca). According to the search results, the specific heat capacity of calcium is approximately 0.647 J/g°C [[1]].

Now, we can calculate the heat effect of the reaction using the given information.

Q = m * c * ΔT 480,000 J = 30g * 0.647 J/g°C * ΔT

Solving for ΔT: ΔT = 480,000 J / (30g * 0.647 J/g°C) ΔT ≈ 25.2°C

Therefore, the heat effect of the reaction is approximately 25.2°C.

This calculation is based on the specific heat capacity of calcium and the given heat release during the complete combustion of 30 grams of calcium.

I hope this explanation helps! Let me know if there's anything else you'd like to discuss.