Determine the density of co2 at the sublimation temperature of -78degree celsius and 1 atm , assuming idle behaviour of gas
Answers
Answer:
The density of carbon dioxide at STP is 0.00196 g/mL.
Density has the equation:
ρ is density
m is mass
v is volume
The information that carbon dioxide (CO2) is at STP (standard temperature and pressure) tells us that one mole of the gas occupies 22.4 liters. We have the volume! We also have the mass, but indirectly. 1 mole of anything is its atomic mass, which we can get from adding the individual molar masses of the elements in the compound from the values off of the periodic table.
Carbon has a molar mass of 12.01 g/mole.
Oxygen has a molar mass of 16.00 g/mole.
Molar Mass of CO2
Element
Quantity
Molar Mass off Periodic Table (g/mole)
Total (g/mole)
Carbon
1
12.01
12.01
Oxygen
2
16.00
32.00
Total mass of one mole of CO2 = 44.01 g/mole
Therefore, 1 mole of CO2 is 44.01 g.
Plugging this information into the density equation we get:
That may seem like a large density for a gas, but it is per liter. We can convert this value to grams-per-milliliter, which makes the density of CO2 at STP 0.00196 g/mL.