Asealed balloon is filled with 2.20 liters of helium gas at 20.0°
c. if the pressure does not change, what is the temperature when the balloon expands to a volume of 2.60 liters

The temperature when the balloon expands to 2.60 L is 346 K

Explanation:

Given:

Initial volume of the ballon, V1 = 2.20 L

Initial Temperature, T1 = 20 C

Final volume of the ballon, V2 = 2.60 L

To determine:

Final Temperature, T2

Explanation:

Based on the ideal gas equation

where P = pressure, V = volume ; n = moles of gas

R = gas constant, T = temperature

At constant n and P, the above equation becomes:

V/T = constant

This is the Charles law

Therefore:

the correct answer is:

a. formation of precipitation