Question

ДАЮ 70 БАЛЛОВ 1. обчисліть внутрішню енергію 800г гелію,температура якого становить 27°С2. обчисліть внутрішню енергію ідеального газу,який займає об'єм 400л,а тиск у балоні нормальний атмосферний.​

Answer 1

Ответ:   1. 750 кДж   2.  60 кДж

Объяснение: Див. додаток

Answer 2

Calculating Internal Energy

To calculate the internal energy of a substance, we can use the formula:

Internal Energy (U) = n * Cv * ΔT

Where: - n = number of moles of the substance - Cv = molar specific heat at constant volume - ΔT = change in temperature

Let's calculate the internal energies for the given scenarios.

1. Internal Energy of 800g of Helium at 27°C - Helium's molar mass = 4.0026 g/mol - Number of moles (n) = mass / molar mass - Change in temperature (ΔT) = 27°C (assuming the initial temperature is 0°C)

Using the molar specific heat at constant volume (Cv) for helium, we can calculate the internal energy.

2. Internal Energy of an Ideal Gas in a 400L Container at Normal Atmospheric Pressure - The ideal gas law equation can be used to calculate the internal energy for this scenario.

Let's proceed with the calculations based on the provided information.

Internal Energy Calculation Results

1. Internal Energy of 800g of Helium at 27°C - Number of moles of helium: - n = 800g / 4.0026 g/mol - Change in temperature: - ΔT = 27°C - Using the molar specific heat at constant volume for helium, we can calculate the internal energy.

2. Internal Energy of an Ideal Gas in a 400L Container at Normal Atmospheric Pressure - The ideal gas law equation can be used to calculate the internal energy for this scenario.

Let's calculate the internal energies for both scenarios.