Internal energy of the ideal gas Instruction card for students

Internal Energy

-        To deduce the formula of internal energy of an ideal gas.

-        Calculate the internal energy of a gas.

(I) Task 1. Write the formula of internal energy of an ideal gas in your notebook

1. Write down the formula you will use.

2. Write a step-by-step formula.

 (W) Task 2. Choose task

Calculate the internal energy of 1 mole of an ideal monatomic gas at a temperature 127 ⁰С.

 (G) Task 3. Solve tasks in a notebook in pairs on the criteria:

1. What is the internal energy of 10 mol of argon at 2 °С?

2. Find the internal energy U of a mass m = 20 g of oxygen at temperatures t = 10 °С.

3. Find the internal energy U of diatomic gas, located in a vessel of volume V = 2 L under pressure р = 150 kPa.

Homework:

1.      Find the internal energy U given the mass m = 20 g nitrogen at a temperature of t = 10 °С.

2.      What is the internal energy of helium, fill a balloon with a volume of V = 60 m³ when pressure р = 100 kPa.

3.      How will the internal energy of an ideal monatomic gas change, if its pressure increases 3 times and the volume becomes 2 times smaller?

4.