13. (03.02 LC)
2 answers:
You might be interested in
<u>Answer:</u> The final volume of the gas is 825.12 mL
<u>Explanation:</u>
To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
where,
are the initial volume and temperature of the gas.
are the final volume and temperature of the gas.
We are given:
Putting values in above equation, we get:
Hence, the final volume of the gas is 825.12 mL
<u>Answer:</u> The mass of HF reacted is 150 g.
<u>Explanation:</u>
We are given:
Amount of energy released = -345 kJ
For the given chemical reaction:
By Stoichiometry of the reaction:
184 kJ of energy is released when 4 moles of hydrofluoric gas is reacted.
So, 345 kJ kJ of energy will be released when = of hydrofluoric gas is reacted.
Now, to calculate the mass of HF, we use the equation:
Molar mass of HF = 20 g/mol
Moles of HF = 7.5 moles
Putting values in above equation, we get:
Hence, the mass of HF reacted is 150 g.