Magine that you have a 7.00 l gas tank and a 2.00 l gas tank. you need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. if you fill the larger tank with oxygen to a pressure of 115 atm , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? assume ideal behavior for all gases.

The pressure you should fill the acetylene tank to ensure that you run out of each gas at the same time is 161 atm

Explanation:

To answer this question you need to know acethylene combustion:

C₂H₂ + 5/2 O₂ → 2 CO₂ + H₂O

The same P*V  in both oxygen and acetylene tanks will produce the same moles in each tank. As you need 5/2 of O₂ more than C₂H₂ moles:

115 atm* 7,00L = 805

805 * (1 mol C₂H₂/5/2 mol O₂) = 322

322 = PV

As volume of tank is 2,00L

P = 161 atm

I hope it helps!

I hope it helps!

The pressure of acetylene should be 161 atm.

Explanation:

Let's consider the reaction between oxygen and acetylene. This is a combustion reaction that produces carbon dioxide and water.

C₂H₂ + 2.5 O₂  ⇄ 2 CO₂ + H₂O

For O₂, we know it occupies 7.00 L and exerts a pressure of 115 atm. The welding with acetylene takes place at around 3373 K. In these conditions, we can use the ideal gas law to find out the amount of oxygen.

Using the balanced equation, we can calculate how much acetylene we need for 2.91 moles of O₂.

So, 1.16 moles of C₂H₂ occupy 2.00L at 3373 K. The pressure it exerts is:

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.