Question

A 7.94 g of solid CO2 (Dry ice) is allowed to sublime in a balloon. The final volume of the balloon is 1.00 L at 301 K. What is the pressure?

Answer 1

In order to find the pressure in this situation, we will be using the Ideal gas Law, which perfectly correlates these informations, the formula for this Law is:

PV = nRT

Where:

P = pressure, we want to find it

V = volume, 1.00 L

n = number of moles, we will also find it

R = is the gas constant, 0.082

T = 301 K

To find the number of moles, we need to use the mass provided in the question and also the molar mass of CO2, 44.01g/mol

44.01g = 1 mol

7.94g = x moles

x = 0.180 moles of CO2

Now we can use the ideal gas formula:

P * 1.00 = 0.180 * 0.082 * 301

P = 4.44 atm