Answer:
40%
Explanation:
The efficiency of a plant is determined by
Our produced energy is
While the input energy can be calculated
So, the efficiency of plant is
or 40% efficient
A group goes vertically and a period goes horizontally.
(a group goes down and a period goes across)
Answer:
Explanation:
Solubility of many solid in a solvent increases with increase in temperature. Increase in temperature increases kinetic energy of the solute, increasing collision and weakens the intermolecular force within the solute. This makes the solute dissolve faster in their solvents.
During recrystallization, more solutes are added to the solvent at higher temperature so that a supersaturated solution is produced on cooling. As the solution cools the over saturated solute begins to precipitate out of the solution.
Recrystallization is a form of purification if solid, as the crystalline solids continue to precipitate it reject impurities are comes out as a purer solid
Explanation:
Membrane is a barrier that separates two phases and that totally or partially restricts the transport of one or more chemical species present in the phases. The membrane separation method is based on the use of chemical potential and/or electrical potential gradient as the driving force for the separation. The membrane separation unit operation is based on the use of chemical potential and/or electrical potential gradient as the driving force for the separation.
Given that chemical potential is a function of pressure, temperature and concentration, and that membrane separation processes are generally operated at a constant temperature, both concentration gradients and pressure gradients can act as driving forces capable of promoting the transport of a given species across the membrane.
Examples of processes where the driving force is the pressure gradient are: Microfiltration, Nanofiltration, and Reverse Osmosis. Processes where the driving force are the concentration gradient: gas permeation, dialysis. Processes whose driving force is the electric potential gradient: electrodialysis.
Density * Volume = Mass
Now we substitute the values in.
19.3 g/cm^3 + 20 cm^3 = 386 g
Mass = 386 g