The gas laws were developed at the end of the 18th century, when scientists began to realize that relationships between pressure, volume and temperature of a sample of gas could be obtained which would hold to approximation for all gases.
Okay, so I've been trying to wrack my brain around this concept for a while but to no avail.
PV = nRT
(Preal + n2*V-2a)(Vreal - nb) = nRT
From these equations, it's clear that real volume is greater than ideal volume under real conditions. I understand that this is because the molecules...
Homework Statement
Suppose an aerosol can contains a residual pressure of 755mm Hg and a temperature of 25*c. What would the pressure be if the can was heated to 1155*c?
Homework Equations
P1xV1=P2xV2
V\proptoT
The Attempt at a Solution
I began by converting the 755mm Hg...
A 6.0L flask contains a mixture of methane, argon, and helium at 45C and 1.75atm. If the mole fractions of helium and Argon are 0.25 and 0.35, respectively, how many molecules of methane are present?
V = 6.0L
T=318.15K
Ptotal=1.75atm
mole fraction: XHe=0.25
XAr=0.35
XCH4=0.40...
1) If air contains 1% AR by volume, what is the mass of Argon in a 2L balloon of air at 25 degress celsius?
2) If for a real gas, P = RT(V - b) - a/V^2
where a and b and R are constants, P = pressure, T = temperature and V = volume.
What does a large a value represent in a real gas?
3)A...
Homework Statement
CxHy gets burned in oxygen gas and makes CO2 and water. Given the partial pressure of water and the total pressure of the resulting mixture I need to find the empirical formula.
Homework Equations
Well PV=nRT is the obvious choice...but all the information you see...
I was recently taught about the three gas laws:
1)Boyle's Law, which stated that pressure is inversely proportional to volume and vice-versa at a constant temperature.
2)Charle's Law, which stated that volume is directly proportional to temperature at a a constant pressure...
Homework Statement
A cylinder of compressed Oxygen is carried on a spacecraft headed for Mars. The compressed gas cylinder has a volume of 17000 L and is filled to a pressure of 248 atm at 231 K. The maximum pressure the cylinder can hold is 1000 atm.The contents of the cylinder are then...
Is pressure distinct from temperature in gas laws? How do we separate these attributes?
Take Charles law for example, now unless I've read this example from a textbook (textbook Silberberg Chemistry 3rd edition ) incorrect, it describes an experiment to determine the relationship between the...
A 2.80g sample of an unknown chlorofluorocarbon is decomposed and produces 552mL of chlorine gas at a pressure of 756 mmHg and a temperature of 298K.
What is the percent chlorine (by mass) in the unknown chlorofluorocarbon? PV= nRT
D= m/vOk, so for this problem I tried using the PV=nRT...
gas laws problem (need quick help please)
Homework Statement
ill try to describe the situation as best i can
at first we have a flask (150 ml) with 0.1g of NaHCO3 we attach a syringe with 20ml of acetic acid (CH3COOH ) to it (and seal it off so nothing escapes)
we inject the acetic acid...
Hi all, new guy here. I am trying to understand the laws that govern a diesel motor. I know it compresses air at about 17 to 1 to ignite the fuel and I think that fuel will expand the air in the chamber at about 5 times the volume consistently (from tdc to end of stroke). I am trying to figure...
This is an absurd question, but the answer is beyond me:
According to Boyle's Law, we get the relationship: P=k/V (k=constant)
According to Charles' Law, we get: V/T=k
And, P/T=k
My question is rather an conceptual "what if": if we increase, say, the volume of the an ideal gas, it's...
[SOLVED] Gas Laws Problem
Homework Statement
A steel tank is completely filled with 2.90 metres cubed of ethanol when both the tank and the ethanol are at a temperature of 33.5 degrees Celsius.
When the tank and its contents have cooled to 16.5 degrees Celsius, what additional volume of...
[b]1. The density of air is 1.3g/L at standard conditions of 101kPa and 0 degrees celcius. determine the mass of 3.0 L of air at a pressure of 138.2 kPa and a temp of 273 degrees celcius.
2. One atmosphere of air pressure supports a column of water approximately 10.3 m high. A 2.0-cm^3...
Homework Statement
This figure (file attached) shows a container that is sealed at the top by a movable piston. Inside the container is a ideal gas at 1.00 atm, 20.0 degrees Celsius, and 1.00 L.
The gas sample has now returned to its original state of 1.00 atm, 20.0 degrees Celsius and...
Homework Statement
What is the resulting pressure when the quantities of gases listed below
are mixed and placed in a 12 L vessel at constant temperature?
4.0 L Ne measured @ 2.0 atm
2.0 L He measured @ 3.0 atm
2.0 L Ar measured @ 5.0 atm
Homework Equations
P1V1=P2V2
The Attempt...
Magnesium burns in oxygen gas to produce magnesium oxide. What mass of magnesium will react with a 0.25 L container of oxygen gas at 80oC and 770 mmHg? :confused:
I need to use stoichiometry to set up the pronlem and PV=nRT to solve.
I have three possible solutions, but I don't know...
Liquid helium at 4.2 K has a density of 0.147 g/mL. Suppose that a 1.00-L metal bottle that contains air at 118K and 1.0 atm pressure is sealed off. If we inject 120.0 mL of liquid helium and allow the entire system to warm to room temperature (25 °C), what is the pressure inside the bottle?
As a hot air balloon rises to increasingly higher altitudes describe what happens to the volume of the balloon if at constant pressure?
My teacher had us do a PTV cards activity, where we took an index card and wrote the letters P(for pressure), T(for temperature), and V(for volume)...
A 20 liter stainless steel container was charged with 2 atm of hydrogen gas and 3 atm of oxygen gas. A spark ignited the mixture, producing water. What is the pressere in the tank at 25 degrees C?
If the reaction in the above problem occurred at 125 degrees C, what would the pressure in the...
Here is the example I was given:
------------------------------
Example:
How many liters of hydrogen gas can be produced at 290 K and 2.5 atm if 40.0 g of sodium react with excess water according to the following equations:
2 Na(s) + 2 H2O(l) --> 2 NaOH(l) + H2(g)...
could u guys tell if I am right with these:
1)
a) calculate the volume occupied by 6.5 g of Nitrogen gas @ STP
\frac{1_{mol}}{28g_{N_2}}=\frac{x_{mol}}{6.5g}
x\sim0.23
\frac{101.3*V}{273*0.23}=8.31
so i got that 6.5 grams of N_2 is ~ 0.23 mol so using the ideal gas law i solved for...
I know this might be a chemistry question in a way, but they also have Gas Laws problems in a physics textbooks.
I have no idea how to solve this problem. I used the pressure ratios to determine the percent increase in volume. But I'm stuck there. Please help. Thanks.
Hello,
I am in the middle of revising topics for the materials section of myend of year exam. For some reason my department give out past papers but do not give out answers.
Any answers to any of the follwing questions would be very helpful. I don't think too much detail is required just a...
I have a few homework problems on the Ideal Gas Laws, was wondering if someone could help me out with a few of the problems.
1) Hemoglobin has a molecular mass of 64 500 u. Find the mass (in kg) of 873 molecules of hemoglobin.
Here's what I did: (64500 g/mol/6.022x10^23 mol^-1)(873...