Thursday, December 19, 2013

Weekly Summary Assignment in Chemistry

Why does a pressure cooker cook your food more quickly
Pressure cooker is capable of speeding up cooking by raising temperature by as much as 257 degrees Fahrenheit more by trapping much heat inside the cooker than the usual method. It uses trapped steam that builds up pressure to cook the food inside. Steam pressure hastens the release of heat in the air therefore saving time in cooking food.

Why do oil and water not mix Why can detergents and soaps force them to mix
Oil and water does not mix because of the factors that make them different from each other. First the two of them is known as immiscible or unlikely to mix because of their molecules and densities. Oil is much heavier and obviously less fluid than water so it tends to sink down while the water floats above it. Water has slightly polar molecule while oil has not. Soap is a chemical that is both polar and non polar so it tends to be a binder for the two molecules to attached at each end of the soap molecule so with the help of it and detergents one can make a way to mix them together.
Discuss the steps required to dissolve a solute into a solvent.

What changes must occur in the solute
For a solute to be dissolved in a solvent its particles or molecules has to gradually break into smaller pieces to combine with the particles of a solvent.

What changes must occur in the solvent
The molecules of the solvent will then start to move out or expand to make room for the new molecules. Once they combine the solute will evenly spread out on the solvent.
c) How can we predict if a solute will dissolve in a selected solvent
   
For us to predict if a solute will dissolve in a selected solvent, we have to determine the solubility rate or if they are miscible. These involved the saturation rate, solubility rate and specific chemical component of the solute to be dissolved in a solvent.

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