Strickness Essay Example

Strickness Essay Example Strickness Essay Strickness Essay Strickness Strictness Can?t be out past eleven, can?t wear what you want to wear, can?t do your hair how you want, and can?t spend your money how you want. Welcome too only some of the rules that my overly strict parents have placed on me. What have I done to deserve this Nothing. This is a problem that most teens and children face: overly strict parents. Even though my parents are overly strict, I know they are doing this for my own good. My parents have always been strict on my other siblings and me. As we got older it only got worse. When I was about 8-14 the war between my parents and me was not as bad. My brother and I had no problem being in by nine-o-clock (that was our curfew until we were in high school), mainly because our transportation was our parents, and they would pick us up from wherever we were. Our curfew wasn?t really ever a big deal with my brother and me. What caused the biggest fights was that we wanted to go to different places with our friends that our parents did not approve of. Our mom and dad would not let us go parents, home, mom, go, wanted, out, until, strict, raised, house, friends, brother, started, much, friend, didn?t, day, very, school, said, rules, party, one, older, new, everyone, ever, else, dad, bus, because, back, wear, way, walked, trouble

Chemical Equilibrium in Chemical Reactions

Chemical Equilibrium in Chemical Reactions Chemical equilibrium is the condition which occurs when the concentration of reactants and products participating in a chemical reaction exhibit no net change over time. Chemical equilibrium may also be called a steady state reaction. This does not mean the chemical reaction has necessarily stopped occurring, but that the consumption and formation of substances have reached a balanced condition. The quantities of reactants and products have achieved a constant ratio, but they are almost never equal. There may be much more product or much more reactant. Dynamic Equilibrium Dynamic equilibrium occurs when the chemical reaction continues to proceed, but a number of products and reactants remain constant. This is one type of chemical equilibrium. Writing the Equilibrium Expression The equilibrium expression for a chemical reaction may be expressed in terms of the concentration of the products and reactants. Only chemical species in the aqueous and gaseous phases are included in the equilibrium expression because the concentrations of liquids and solids does not change. For the chemical reaction: jA kB → lC mD The equilibrium expression is K ([C]l[D]m) / ([A]j[B]k) K is the equilibrium constant[A], [B], [C], [D] etc. are the molar concentrations of A, B, C, D etc.j, k, l, m, etc. are coefficients in a balanced chemical equation Factors That Affect Chemical Equilibrium First, consider a factor that does not affect equilibrium: pure substances. If a pure liquid or solid is involved in equilibrium, it is considered to have an equilibrium constant of 1 and is excluded from the equilibrium constant. For example, except in highly concentrated solutions, pure water is considered to have an activity of 1. Another example is solid carbon, which may be form by the reaction of two carbom monoxide molecules to form carbon dioxide and carbon. Factors that do affect equilibrium include: Adding reactant or product or a change in concentration affects equilibrium. Adding reactant can drive equilibrium to the right in a chemical equation, where more product forms. Adding product can drive equilibrium to the left, as more reactant forms.Changing the temperature alters equilibrium. Increasing temperature always shifts chemical equilibrium in the direction of the endothermic reaction. Decreasing temperature always shifts equilibrium in the direction of the exothermic reaction.Changing the pressure affects equilibrium. For example, decreasing the volume of a gas system increases its pressure, which increases the concentration of both reactants and products. The net reaction will see to lower the concentration of gas molecules. Le Chateliers principle may be used to predict the shift in equilibrium resulting from applying a stress to the system. Le Chateliers principle states that a change to a system in equilibrium will cause a predictable shift in equilibrium to counteract the change.  For example, adding heat to a system favors the direction of the endothermic reaction because this will act to reduce the amount of heat.