The temperature of the vessel before being filled with solvent is 105 degrees, and after the solvent enters it, a certain amount evaporates and the temperature of the vessel decreases to 98.
Knowing the enthalpy of the solvent, how to calculate the volume of evaporated solvent?
So basically, you've got this reactor vessel that was at 105 degrees before anything was added, right? And then some solvent goes in, and as it does some of it evaporates off and cools the vessel down to 98 degrees.
Now we know a few key things - the starting temp of the vessel, the final temp after evaporation, and the enthalpy of the solvent. Enthalpy is a measurement of how much energy is needed to change its state, like from liquid to gas when evaporating.
So here's how you use that info to figure out exactly how much solvent became vapors:
First, take the temperature change - which is 105 to 98 degrees, so a drop of 7 degrees.
Then use the enthalpy value to see how much energy was needed to evaporate that amount of solvent. Energy was used to cause the temp drop we saw.
Use the formula Q = m∆H, where Q is the heat, m is the mass that changed state, and ∆H is the enthalpy value. This lets you solve for m, the mass of solvent that evaporated.
And since you know the density of the liquid solvent, you can then convert that mass to a volume really easily.
Mohd Redzuan Mohd Sofian
I recommended your all researches
and I really appreciate you for answering my question
- Badges
- Science topic
- Similar topics
- Chemistry
- Organic Chemistry