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WorksheetsZoom SI 11.10.22
Total questions: 9
Worksheet time: 14mins
A spontaneous reaction _____.
will be spontaneous in the forward direction and spontaneous in the reverse direction.
can only be spontaneous at standard temperature and pressure.
is usually endothermic.
occurs without outside intervention.
must also be a fast reaction.
Which of the following is not spontaneous?
A gas fills its container uniformly.
A ball rolls down a hill.
An object at 25 °C increases in temperature to 100 °C.
Sodium chloride dissolves in water.
At temperatures below O °C, water freezes.
In which of the following aqueous solutions would you expect PbCl2 to have the lowest solubility?
pure water
0.020 M BaCl2
0.020 M Pb(NO3)2
0.020 M NaCl
0.020 M KCl
In which of the following aqueous solutions would you expect CuBr to have the highest solubility?
0.020 M LiBr
CuBr will have the same solubility in all solutions.
0.010 M KBr
0.030 M NaBr
0.040 M CuNO3
In which aqueous system is CaF2 least soluble?
0.2 M HF
H2O
1.0 M HNO3
0.8 M KF
0.5 M HF
The thermodynamic quantity that expresses the extent of randomness in a system is ____.
internal energy
enthalpy
heat flow
bond energy
entropy
The entropy of the universe is ____.
zero
continually decreasing
continually increasing
constant
the same as the energy, E
Determine the molar solubility of CuCl in a solution containing 0.020 M LiCl. Ksp (CuCl) = 1.0 × 10^-6.
5.0× 10^-5 M
0.20 M
2.0× 10^-8 M
1.0 × 10^-3 M
1.0 × 10^-12 M
Determine the Ksp for magnesium hydroxide (Mg(OH)2) where the solubility of Mg(OH)2 is 1.4 × 10^-4 M.
2.7 × 10^-12
1.1 × 10^-11
1.4 × 10^-4
2.0 × 10^-8
3.9 × 10^-8
