0
Assuming we are dealing with a gas, the ideal gas equation can be used.
P*V = n*R*T
we can solve for n as
n = (P*V)/(R*T)
R can be defined for a specific gas to give the specific gas constant. In which case, we notate as "R-bar".
R-bar = R/Atomic Mass
If the solution under consideration is a liquid or a solid, the ideal gas equation is not valid. Given the volume of the liquid or solid, we can calculate the mass from the density since
density = mass/volume
Then we can find the number of moles of the substance by dividing the mass by the molar mass (check your units on this step).
mass/molar mass = number of moles
What else can I help you with?
What is the molar volume of liquid water at standard temperature and pressure?
The molar volume of liquid water at standard temperature and pressure is approximately 18.07 cm/mol.
How do you Calculate the molar volume of a gas?
use pv=nrt, where p = pressure , v = volume, n=moles, r is a constant (8.413372) and t is the temperature. you can also use pv/t = pv/t where one side is stp (standard temperature and pressure) and the other side is your information with one variable left over, in your case volume, that you then calculate.
How do you find molar volume?
You can find molar volume by dividing the volume of a gas by the number of moles of gas present. The equation to calculate molar volume is V = nRT/P, where V is volume, n is the number of moles, R is the ideal gas constant, T is temperature, and P is pressure.
What is difference between partial molar volume and specific volume?
Partial molar volume is the volume occupied by one mole of a component in a mixture at constant temperature and pressure, while specific volume is the volume occupied by one unit mass of a substance. Partial molar volume takes into account the presence of other components in the mixture, while specific volume is unique to a single substance regardless of its surroundings.
Explain why the molar volume of a gas at RTP is greater than that of the gas at STP?
At RTP the assumed temperature is 293ºK, at STP the assumed temperature is 273ºK. The formula used for this is Pressure x Volume = moles x ideal gas constant x Temperature. So Volume = (moles x ideal gas constant x temperature) / Pressure Assuming Pressure and moles stays constant... Volume at RTP = ( 1 mole x 8.31451 x 293 K ) / ( 101.325 Pa) Volume at RTP = 24.0429 Volume at RTP = 24.0dm^3 Volume at STP = ( 1 mole * 8.31451 * 273 K ) / ( 101.325 Pa) Volume at STP = 22.4017 Volume at STP = 22.4dm^3
What three things affect airpressure?
Heat, number of molecules, atmospheric pressure and volume Volume * Pressure = molecules * molar gas constant * Heat
Why we use two type of molar specific heat?
For gases, there is heat specific heat capacity under the assumption that the volume remains constant, and under the assumption that the pressure remains constant. The reason the values are different is that when heating up a gas, in the case of constant pressure it requires additional energy to expand the gas. For solids and liquids, "constant volume" isn't used, since it would require a huge pressure to maintain the constant volume.
How do you prove that the molar heat capacity at the constant volume?
no be quiet
What is the formula for finding pressure?
I suppose you mean the formula for the variation in pressure. The simplest expression of this is, at a fixed temperature,and for a given mass of gas, pressure x volume = constant. This is known as Boyle's Law. If the temperature is changing, then we get two relations: 1. If the pressure is fixed, volume = constant x temperature (absolute) 2. If the volume is fixed, pressure = constant x temperature (absolute) These can be combined into the ideal gas equation Pressure x Volume = constant x Temperature (absolute), or PV = RT where R = the molar gas constant. (Absolute temperature means degrees kelvin, where zero is -273 celsius)
What is the molar volume of liquid water at standard temperature and pressure?
The molar volume of liquid water at standard temperature and pressure is approximately 18.07 cm/mol.
What does molar volume mean for a gas?
Molar gas volume is the volume of ONE moel of gas. It only depends on the pressure and temperature, not on the kind of gas. Molar volume at standard temperature and standard pressure is always 22,4 Litres (for any gas)
Why the molar specific heat at constant pressure is larger than the molar specific heat at constant volume?
The specific heat at constant pressure is larger than the molar specific heat at constant volume because if heat is added to a system it not only heats up but expands in volume. Therefore the system is doing work against the external pressure and the heat is not only stored as kinetic and potential energy but is also required to perform work. In general more heat can be stored in a system at constant pressure than one at constant volume. The specific heat at constant pressure is larger than the molar specific heat at constant volume because if heat is added to a system it not only heats up but expands in volume. Therefore the system is doing work against the external pressure and the heat is not only stored as kinetic and potential energy but is also required to perform work. In general more heat can be stored in a system at constant pressure than one at constant volume.
Why has a gas two values of molar heat capacities?
Gasses have two specific heat capacities because the boundary conditions can affect the number by up to 60%. Therefore, a number is given to each boundary condition: isobaric (constant pressure) or isochoric (constant volume). In an ideal gas, they differ by the quantity R (the gas constant - the same one you use in the ideal gas law): Cp = Cv + R where Cp is the isobaric molar heat capacity (specific heat) and Cv is the isochoric molar heat capacity.
How do you find molar volume?
You can find molar volume by dividing the volume of a gas by the number of moles of gas present. The equation to calculate molar volume is V = nRT/P, where V is volume, n is the number of moles, R is the ideal gas constant, T is temperature, and P is pressure.
How do you Calculate the molar volume of a gas?
use pv=nrt, where p = pressure , v = volume, n=moles, r is a constant (8.413372) and t is the temperature. you can also use pv/t = pv/t where one side is stp (standard temperature and pressure) and the other side is your information with one variable left over, in your case volume, that you then calculate.
What is difference between partial molar volume and specific volume?
Partial molar volume is the volume occupied by one mole of a component in a mixture at constant temperature and pressure, while specific volume is the volume occupied by one unit mass of a substance. Partial molar volume takes into account the presence of other components in the mixture, while specific volume is unique to a single substance regardless of its surroundings.
What is the value and units of the molar gas constant?
The value of the molar gas constant is approximately 8.314 J/(mol•K). It is a universal constant used in the ideal gas law equation to relate the pressure, volume, temperature, and amount of gas in a system.
