Question

When two chemicals have the same molecular formula they are said to be structural isomers. Propanoic Acid (CH2CH2COOH) and Methyl Acetate (CH3COOCH3) are an example of structural isomers. Which substance has the lowest vapor pressure? propionic acid O methyl acetate Question 10 (1 point) Hydrogen gas reacts with 5.00 L of nitrogen gas under isobaric and isothermal conditions to form 10.0 L of ammonia gas (NH3). What is the minimum volume of hydrogen gas required to produce this amount of ammonia? 15.0L 7.50 L 30.0L 5.00 L

please answer both

Answer 1

9. Due to lack of hydrogen-bond donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight. A substance with higher volatility will have a higher vapour pressure as the pressure exhibited by vapor present above a liquid surface is known as vapor pressure.

Therefore in the aforesaid question propionic acid will have a lower vapour pressure.

10. N_{​​​​​​2} + 3H₂ →2NH₃

It is the balanced chemical equation for formation of ammonia from hydrogen and nitrogen which is also known as Haber's process.

In the balanced chemical reaction 1mole of nitrogen reacts with 3moles of hydrogen to give rise to 2moles of ammonia.

According to Avogadro's Law, under similar conditions of temperature and pressure equal volume of all gases contain equal number of molecules.

Hence no. of moles can directly be replaced by volume.

In the question 5L of nitrogen gives rise to 10L of ammonia. As 1mole of nitrogen gives 2moles of ammonia, nitrogen has completely been consumed.

As 1mole of nitrogen requires 3moles of hydrogen, 5L of nitrogen will require minimum 15L of hydrogen gas likewise.

Correct option will be A) 15L

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