Chapter 17
The reaction should be heated.
How is it possible to cause an endothermic reaction to proceed when the reaction causes energy to become less dispersed?
8.38 x 10^20
How many molecules of aspirin (formula mass = 180 amu) are there in a 0.250 g sample?
+80 kj/mol
How much energy in kilojoules is released or absorbed from the reaction of 1 mole of nitrogen, n2, with 3 moles of molecular hydrogen h2, to form 2 moles of ammonia, nh3? Consult table 17.1 for bond energies.
endothermic, because ultraviolet light is absorbed during its formation.
Is the synthesis of ozone, O3, from oxygen, O2, an example of an exothermic or endothermic reaction?
There is greater number of effective collisions among reacting molecules.
The yeast in bread dough feeds on sugar to produce carbon dioxide. Why does the dough rise faster in a warmer area?
The slow reaction must have a high activation energy, while the fast reaction must have a low activation energy.
What can you deduce about the activation energy of a reaction that takes billions of years to go to completion? How about a reaction that takes only fractions of a second?
about 64 amu
What is the formula mass of sulfur dioxide, SO2?
CFC molecules migrate to the upper stratosphere where they generate chlorine atoms upon being destroyed by ultraviolet light.
What role do CFC's play in the catalytic destruction of ozone?
16 g of methane, CH4
Which has the greatest number of atoms
