Answer:
20 Liters
Step-by-step explanation:
The ideal gas law equation allows us to find information about a specific gas.
Ideal Gas Law Equation
The ideal gas law equation got its name from the fact that it assumes ideal conditions. Ideal conditions are a set of conditions that make gases easier to work with. These conditions include no intermolecular forces, gas having a negligible volume, and all collisions being perfectly elastic. While these conditions are almost truly met, the ideal gas law allows us to get close to the real answer.
The equation is PV = nRT.
- P is pressure (atm)
- V is volume (L)
- n is moles of has
- R is the gas constant, which is 0.08206 (L·atm/mol·K)
- T is temperature (K)
Solving for Volume
To solve for volume, all we need to do is plug in the information we know and solve for V.
- 78 atm * V = 21 moles * 0.08206 L·atm/mol·K * 900K
For my next calculation, I will leave off units for clarity.
- V = (21 * 0.08206 * 900) / 78
- V ≈ 19.88
The volume of gas is about 20 L. In order to round, I use significant figure rules because 900K has one sig fig.