Question

СРОЧНО 2. На скільки кілокалорій зменшиться внутрішня енергія гасу. що міститься в балоні об'ємом 0,2 м³, якщо його охолодити від 20° до 5°С СРОЧНО

Answer 1

Ответ:значення R для повітря становить 8,31 Дж

Объяснение:

Answer 2

Calculating Change in Internal Energy of Gas

To calculate the change in internal energy of a gas when it is cooled from 20°C to 5°C, we can use the formula:

ΔU = nCvΔT

Where: - ΔU = change in internal energy - n = number of moles of gas - Cv = molar specific heat at constant volume - ΔT = change in temperature

Finding the Number of Moles of Gas

First, let's find the number of moles of gas in the 0.2 m³ container. We can use the ideal gas law equation:

PV = nRT

Where: - P = pressure - V = volume - n = number of moles - R = ideal gas constant - T = temperature

Given: - Volume (V) = 0.2 m³ - Initial temperature (T1) = 20°C = 293.15 K - Final temperature (T2) = 5°C = 278.15 K

We can assume the pressure and the gas constant remain constant, so we can rearrange the ideal gas law equation to solve for n:

n = PV / RT

Calculating the Change in Internal Energy

Once we have the number of moles of gas, we can calculate the change in internal energy using the molar specific heat at constant volume (Cv) for the gas.

Let's find the relevant information for the specific gas in the container and proceed with the calculations.