Reaction Rates
What are 4 things that contribute to the rate of a reaction?
What are the presence of a catalyst, the concentration of the reactants, the temperature of the system, and a change in the surface area.
What is the value of the number of moles of hydrogen gas in 2 grams of it?
What is 1.
Consider the elements Fluorine and Chlorine. Do these elements have equal electronegativity? If not, which is more electronegative?
Fluorine is more electronegative.
Which element forms the strongest hydrogen bond?
What is fluorine?
1. What is an endothermic reaction?
2. What is an exothermic reaction?
1. What is a reaction where the energy of the products is greater than the energy of the reactants. What is a reaction where the delta H is positive.
2. What is a reaction where the energy of the products is less than the energy of the reactants. What is a reaction where the delta H is negative.
What is the explanation on how temperature affects reaction rate? (Hint: think about the kinetic molecular theory)
What is the fact that an increase in temperature results in an increase in average kinetic energy resulting in more particles colliding with the correct energy to react.
What is the empirical formula of a molecule composed of only carbon, oxygen, and nitrogen? It has 3 times as much carbon as nitrogen and 4 times as much oxygen as carbon.
What is NC3O12
What determines electron affinity?
Nuclear charge, atomic size, electron configuration.
What is the ranking of at least three intermolecular forces from weakest to strongest?
What is LDF, Dipole-dipole, Hydrogen Bond, Ion Dipole
What is delta H?
What is the change in total heat of a system?
What type of graph will be produced by a zero order reaction with concentration vs. time?
What is linear graph?
consider the reaction where hydrogen peroxide decomposes into water and oxygen. How many liters of O2 gas would you get if you were to fully decompose 6 moles of H202
What is 67.2 liters
Which element requires more energy to ionize: Chlorine or Bromine?
What is Chlorine
What are London Dispersion Forces (LDF) dependant on?
What are size and surface area.
What happens to the surroundings during an endothermic reaction?
The surroundings get colder
What type of graph is produced for a first order reaction. For a second? (Both of these are for concentration vs time)
What is a logarithmic graph. What is an inverse function graph.
What is the fully balanced chemical equation for the complete combustion of 2,3-dimethylhexane? The formula for 2,3-dimethyl hexane is C8H18.
What is C8H18 + 17O2 yields 8CO2 + 18H2O
In general, which periodic trend is almost identical to electronegativity?
Ionization energy
What is the term for the effect of intermolecular forces on liquids?
What is viscosity
With a singular starting point with heat = k1 and an end point with heat = k2, would delta H be the same regardless of what steps the reactants took to get to the product?
Yes
Consider the balanced chemical equation 3X + 4Y yields 5A + 6D. If the rate of disappearance for X is 6.8E3 Moles per second, what is the rate of appearance for A?
What is 1.133E4
The human body needs at least 1.03 x 10^(-2) mol O2 every minute. If all of this oxygen is used for the cellular respiration reaction that breaks down glucose, how many grams of glucose does the human body consume each minute?
What is 0.309?
Which periodic trend is almost the exact opposite of electronegativity?
What is atomic radius?
What is a direct result of low vapor pressure and high heats of vaporization?
What is strong intermolecular forces?
If 968J of energy added causes 50.g grams of a substance to heat up from 30 deg to 40 deg, what is the substance's specific heat capacity?
What is 1.936