 # Molar Volume Of Gas Lab Report

Great Essays
Molar Volume of a Gas Lab The purpose of the lab was to do an experiment to determine the molar volume of hydrogen gas at standard temperature and pressure, or STP. To start the experiment, a beaker was filled with water and then a cage was created with a copper wire. A piece of magnesium was cut and placed inside the cage in order to keep the reaction going until all of the magnesium reacted with the hydrochloric acid. The eudiometer tube was filled with 15 mL of hydrochloric acid and water and then plugged with a one-hole rubber stopper that held the cage in place, ensuring that the magnesium would react with the excess hydrochloric acid. After covering the hole in the rubber stopper with a finger, the eudiometer tube was immediately inverted …show more content…
Avogadro’s law states that equal volumes of gas, at the same pressure and temperature, have the same amount of molecules. This applies to the lab in that it allows for the verification of the molar volume of hydrogen at standard temperature and pressure once temperature, pressure, and volume are all accounted for. Dalton’s law of partial pressure is another theory that was explored in this lab. It states that the total pressure of a mixture of gases is the sum of the partial pressures of the individual gases. This law makes it possible for the partial pressure of the water vapor to be removed from the total pressure of the gases in the eudiometer tube to yield the partial pressure of hydrogen gas. Molar volume is the volume occupied by one mole of a gas, in this case, hydrogen gas. Molar volume relates to the lab as the entire purpose of this lab is to find the molar volume of hydrogen gas at STP. The ideal gas law describes a relationship between pressure (P), volume (V), the number of moles (n), temperature (T), and the universal gas constant (R) where PV = nRT. This ideal gas law is essential to the lab as it explains the relationships between the different measurements of a gas and reduces into the combined gas law. The combined gas law is a relation where the number of moles of gas is constant, thus leaving the variables of pressure, volume, and temperature. When comparing the same substance under different conditions, the combined gas law can be mathematically written as (P"1" V"1" )/T"1" = (P"2" V"2" )/T"2" . Since the conditions of the experiment were not at standard temperature and pressure, the combined gas law is required in order to calculate the corresponding volume of hydrogen gas at STP. Single displacement reactions were also

## Related Documents

• Superior Essays

Dalton’s Law was relevant in this experiment because it can be used to find the partial pressure exerted by the hydrogen by itself. It was hypothesized that if a gas is created through the reaction Mg + HCl → MgCl2 + H2 at a constant pressure and temperature, then the molar volume can be found out using gas laws because gases have direct and indirect relationships that can be used to find the unknown characteristic of said…

• 1765 Words
• 8 Pages
Superior Essays
• Great Essays

Triplicate trials were performed on each concentration to obtain the mean. Dependent Rate of reaction of hydrogen peroxide decomposition r=(Δpressure/time)/kPa* s-1 Rate of reaction is represented by the peroxide decomposition change of pressure over time. Pressure was measured by using the gas pressure sensor. The same sensor was used throughout the experiment. Also the shortest tube was used to reduce systematic errors.…

• 1608 Words
• 7 Pages
Great Essays
• Improved Essays

Calorimetry allows for the heat of the solution to be calculated since the heat capacity of the calorimeter is known and the change in temperature is observed. The heat capacity is the ability for the container to retain the heat the is produced or absorbed without allowing for the outside environment to impact the reaction. This closed system allows for easy calculations where q_rxn+q_water+q_calorimeter=0. This is important to the lab that the total heat lost and gained must all equal zero. It would be hard to calculate how much heat was lost in the world by the experiment, so isolating the system to the calorimeter allows for the…

• 1267 Words
• 6 Pages
Improved Essays
• Superior Essays

The Calorimetric Determination of Enthalpy and Entropy Changes of the Thermal Decomposition of Sodium Sulphate Decahydrate Abstract Sodium sulphate decahydrate thermally decomposes to anhydrous sodium sulphate at 50⁰ C and cools to form anhydrous sodium sulphate. Using Hess's Law the enthalpy and entropy changes of this process can be determined in order to deduce the spontaneity of the reaction. The transition temperature was determined by melting the hydrated crystals at 50⁰ C and allowing them to cool until a constant temperature was reached. The molar enthalpy and molar entropy changes were determined using calorimetric principles. Different weights of both decahydrate and anhydrous crystals were added to water and the temperature changes…

• 1185 Words
• 5 Pages
Superior Essays
• Improved Essays

Or simply, Ptotal = Pgas1 + Pgas2 + Pgas3 + Pgas4 + ... + Pgas n As previously mentioned, R is the ideal gas constant. In addition to being featured in the Ideal Gas Law equation, R is also used in other equations of thermodynamics. Officially R is equal to 8.314 (L∙kPa)/(mol∙K), 0.08206 (L∙atm)/(mol∙K), or 62.36 (L∙mmHg)/(mol∙K).  The objective of the lab is to prove the Ideal Gas Constant in the Ideal Gas Law. The gas, Butane, will be used to drain water from the Procedure A bucket was first filled with water and then the Graduated Cylinder to 250mL.…

• 752 Words
• 4 Pages
Improved Essays
• Superior Essays

Purpose The purpose of this experiment is to confirm the functional relationship of Boyle’s law through the use of a manometer. The two parts of this experiment will determine the number of moles of oxygen and the second part will determine the number of moles of nitrogen, that will lead to determine the value of R by measuring P, V, and T. Theory/Principles A physical law such as Boyle’s law states that P, the exerted fixed mass of gas at a constant temperature and V, the volume have a relationship. Their kind of relationship is V=f(P) relationship and it is believed that PV go together to remain constant. A water manometer is an instrument used to measure pressure. The model of kinetic theory of gases helps elaborate one of the most difficult…

• 957 Words
• 4 Pages
Superior Essays
• Improved Essays

Furthermore, in the straight pipe, a fully developed laminar assumption is satisfied under the condition that shape change is negligible. Numerical analysis technique the numerical analysis is performed by combining the governing equations related to the conservation of energy, conservation of mass and conservation of electrical charge to examine fluid distributions, heat transfers, mass transfers and electrochemical reactions. The assumptions used in developing the model are as follow: 1) Ideal gas law was employed for gaseous species. 2) The fluid flow in the fuel cell was laminar due to the low flow velocities and the small size of gas flow…

• 928 Words
• 4 Pages
Improved Essays
• Improved Essays

It is a dehydrogenation unit that used to convert isobutane produced from the Butamer to a new compound that is Isobutylene. One of the vital points that must be considered is the feed, which enters this unit. The feed gas must be free of impurities that damage the platinum catalyst. Producing Isobutylene is summarized in the following stages. At the beginning, the isobutane that fed to the Oleflex unit is stored in Isobutane Sphere (V3103).…

• 1817 Words
• 8 Pages
Improved Essays
• Superior Essays

The purpose of the experiment was to observe limiting reactants by using a fixed amount of one reagent along with a varying the amount of the second reagent used in a chemical reaction. Through these results, the concept of limiting reactants can be determined. Using a graph to demonstrate the relation between the volumes of hydrogen gas produced versus the moles of the reagents will help figure out the stoichiometric balance required. The success of the experiment will be determined by the comparing the experimental values with the fixed values. Introduction Stoichiometry involves converting chemical formulas and equations that represent individual atoms, molecules, and formula units to the laboratory scale that uses milligrams, grams, and kilograms, of these substances (1).…

• 1398 Words
• 6 Pages
Superior Essays
• Superior Essays

Chemical reactions can be categorized based on the release or absorption of energy. For instance, chemical reactions that release energy are known as exothermic reactions and have a positive change in enthalpy. Moreover, chemical reactions that absorb energy are endothermic, which have a negative change in enthalpy. Since the energy released is usually heat, keeping track of the heat flow in reactions will help determine the change in enthalpy of a reaction. Observing the measurement of heat changes is known as calorimetry; hence, in this lab a calorimeter was used to measure the changes in enthalpy.…

• 1242 Words
• 5 Pages
Superior Essays