Question
Question: \(3d{{m}^{3}}\) of \({{H}_{2}}\) is mixed with \[4d{{m}^{3}}\] of \[C{{l}_{2}}\] at NTP. Calculate v...
3dm3 of H2 is mixed with 4dm3 of Cl2 at NTP. Calculate volume of HCl obtained and volume of Cl2 unreacted.
Solution
NTP stands for Normal Temperature and Pressure and the term is defined by the National Institute of Standards and Technology abbreviated as NIST. NTP conditions are more realistic and convenient conditions so it is widely used as a practical standard by Industries throughout the world.
Complete step by step answer:
- In NTP the normal temperature is 20-degree Celsius, 293.15 K or 68-degree F. This temperature is convenient to use as compared to 0-degree Celsius , normal pressure is 1 atm,101.325 kpa, 760 mmHg (or torr) or 14.6959 psi and one mole of an ideal gas occupies 24.0 litres (dm3) of volume.
According to the question:
3dm3H2+4dm3Cl2→xHCl
Suppose it gives x dm3 of HCl.
Now we know that normally 1 dm3 of H2 reacts with 1 dm3 of Cl2 and make 2 dm3 of HCl. Reaction can be shown as follows:
H2+Cl2→2HCl
So from here we can conclude that H2 acts as limiting reagent.
So we can consider that 3 dm3 of H2 reacts and make 6 dm3 of HCl and in this case 1 dm3 of Cl2 remain unaltered.
Hence volume of HCl obtained is 6 dm3 and volume of Cl2 unreacted is 1 dm3.
Note: Limiting reagents are defined as those substances which are completely consumed in the completion of a chemical reaction and can also be known by the name limiting agents or limiting reactants. According to the stoichiometry of chemical reactions, a fixed amount of reactants is required for the completion of the reaction.