O2N-NO2 (g) = 2 NO2 (g)
The reaction will be
endothermic, exothermic
zero, one, many
The layer sequence of LiCl is shown below. The reaction for dissolving
the extended solid in water is LiCl (s) --> Li+ (aq) + Cl- (aq).
How many bonds are broken per LiCl formula unit when a chunk of LiCl dissolves?
zero, one, many
those in the reactants, those in the products
What effect will spraying H2O into the system have if NH3
is far more soluble in H2O than N2 and H2?
no effect, increase product, increase reactants
n H2C=CH2 (g) --> -[-CH2-CH2-]-n
This reaction is
exothermic, endothermic, thermoneutral
What happens to the entropy in this reaction?
increases, decreases, remains the same
exothermic, endothermic
If heat were added to the graphite/C60 system, would the equilibrium
shift toward graphite or C60?
graphite, C60
A, B, C
A, B, C
Large
E and low temperature
LargeE and high temperature
SmallE and low temperature
SmallE and high temperature
222. Plotted below are graphs of heat absorbed versus temperature for two systems. Which system has the larger heat capacity?
A, B
236. Dissecting a Polymerization Reaction
Polyethylene is formed when the molecule ethylene is polymerized. Approximately how many C-C single bonds are formed from n molecules of ethylene? [The instructor may want to draw approximately half a dozen H2C=CH2 molecules in a line, sketch electron movement with arrows, and draw the resulting alkane to help students visualize this process.]
n
2n
3n
For the net reaction
nC2H4(g) ---> -[CH2-CH2]-n(s)
What is the sign of S?
S>0
S<0
S=0
Given that a mole of C=C double bonds is worth approximately 600 kJ/mol
and a C-C single bond is worth approximately 350 kJ/mol, what is the sign
of H?
H>0
H<0
H=0
Does H or
S drive this reaction?
H
S
More questions are needed for this section. Please submit contributions
to concept@chem.wisc.edu..