Presentor

This week in class a presenter came to talk to us. His name was David Webb he has worked with vacuums almost all his life. He did a variety of different experiments all were very entertaining and fun. During his demonstrations he taught us about atmospheric pressure and vacuums. One of the demonstrations was a bell that kept ringing while still in the vacuum that silenced the bell for awhile.

Equilibrium

In a chemistry class, chemical equilibrium is the state in which the chemical activities or compounds of the reactants and products have no net change over time. Usually, this would be the state that results when the forward chemical process proceeds at the same rate as their reverse reactions. The reaction rates of the forward and reverse reactions are generally not zero but, being equal, there are no net changes in any of the reactant or product concentrations.

Phase Changes for water

Transitions between solids, liquids and gases all are apart of the phase change. Heat is added to the constant rate at each phase change.

Specific Heat Capacity

The value of the specific heat is different for various types of matter. Water has the highest specific heat of any substance. Heat temperature of those things with a high specific heat much less than those things with a high specific heat much less than those with the low specific heat.

Convection

In chemistry class we are learning Convection is the movement of molecules within fluids etc. It cannot take place in solids, since neither bulk current flows or significant diffusion can take place in solids.Convection is one of the major modes of heat transfer and mass transfer.