923.85 grams of gaseous ammonia condenses into liquid.How much energy was released?
answer: 1268.28852 = 1268 kj
When you post a problem like this you should tell us what you used for the heat vaporization. Not all sources give the same number. Using 23.25 kJ/mol I obtained 1263.5 kJ which I would round to 1264 kJ.
To determine the amount of energy released when gaseous ammonia condenses into liquid, we need to use the concept of enthalpy of condensation. Enthalpy is a measure of the heat energy within a system, and condensation refers to the change of state from gas to liquid.
Before we can calculate the energy released, we need to find the amount of substance in moles. To do this, we divide the given mass of ammonia by its molar mass. The molar mass of ammonia (NH3) is approximately 17.03 g/mol.
Mass of ammonia = 923.85 grams
Molar mass of ammonia = 17.03 g/mol
Number of moles = Mass / Molar mass:
Number of moles = 923.85 g / 17.03 g/mol ≈ 54.24 mol
Now, we can use the concept of molar enthalpy to determine the energy released during condensation. The molar enthalpy of condensation for ammonia is approximately 23.3 kJ/mol.
Energy released = Number of moles × Molar enthalpy:
Energy released = 54.24 mol × 23.3 kJ/mol ≈ 1267.872 kJ
Therefore, the amount of energy released when 923.85 grams of gaseous ammonia condenses into a liquid is approximately 1267.872 kJ.