For each of the following pairs of substances, determine which
has the larger molar entropy at 298 K:
(A) Cl2(g) or (B) Br2(l)
(C) Ni(s) or (D) Fe(s)
(E) C2H6(g) or (F) C2H4(g)
(G) CH4(g) or (H) CCl4(g)
(I) MgO(s) or (J) HgO(s)
(K) MgCl2(aq) or (L) NaCl(aq
For the following pairs which has the higher entropy
(a) 1 mole of gaseous heptane and 1 mole liquid heptane (both at
50oC)
(b) 1 mole of liquid ethanol at 20oC and 1 mole of liquid
ethanol at 40oC
(c) 1 mole of oxygen (O2) gas and 1 mole of ozone gas (O3) (both
at 25oC)
(d) 1 mole of hydrogen gas in 20 L and 1 mole of hydrogen gas in
10 L (both at 0oC)
In each pair, identify all the intermolecular forces, and select
the substance with the higher boiling point.
(a) CH3Br or CH3F
What intermolecular forces are present? (Select all that
apply.)
dipole-dipole or dispersion or H bonds
Which substance has the higher boiling point ?
CH3Br or CH3F
(b) CH3CH2OH or
CH3OCH3
What intermolecular forces are present?
dipole-dipole or dispersion or H bonds
Which substance has the higher boiling point ?
CH3CH2OH or
CH3OCH3
(c) C2H6 or C3H8
What intermolecular forces...
In each pair, identify all the intermolecular forces, and select
the substance with the higher boiling point.
(a) CH3Br or CH3F
What intermolecular forces are present? (Select all that
apply.)
dipole-dipole
dispersion
H bonds
(b) CH3CH2OH or
CH3OCH3
What intermolecular forces are present?
dipole-dipole
dispersion
H bonds
(c) CH4 or CCl4
What intermolecular forces are present?
dipole-dipole
dispersion
H bonds
Two substances, A and B, have the same mass. Substance A is at a
higher temperature than B, and heat transfers between them until
equilibrium is reached. The decrease in the temperature of A is
less than the increase in temperature of B. Which substance has the
larger specific heat?
3. Imagine there are five glasses, each of which contains one of
these substances. Which substance is a heterogeneous mixture?
A) wine
B) beer
C) water
D) salt water
E) air
5.What answer should be reported, with the correct number of
significant figures, for the following calculation? (433.621 -
333.9) × 11.900
a 1.19 × 103
b1.187 × 103
c 1.1868 × 103
d 1.18680 × 103
e 1.186799 × 103
The mass of a proton is 1.67 × 10-27...
In each pair, indicate which substance has the stronger
intermolecular forces and explain your reasoning: (a) Ne, Ar; (b)
NF3, BF3; (c) SiH4, GeH4; (d) NaF, HF.
For each pair
of substance, identify the dominant intermolecular forces in each
substance, (and select the substance with the stronger
intermolecular forces)
A.) MgCl2 or
PCl3
B.) CH3NH2 or
CH3F
C.) CH3OH or
CH3CH2OH
D.) Hexane or
Dimethylbutane
Please show all
steps clearly.
Provide three examples of the exchange of vital substances in
animals.
- For each substance
- List the substance List organs or organ systems involved in
the exchange of the substance in humans
- Describe a different strategy for the exchange of the
substance in a non-vertebrate animal
Determine how many particles are in a 78 mole sample of any
substance.
Use the equation: particles= mole (given in the problem) x
Avogadro's number (6.022 x 1023)
7.7 x 1021
6.022 x 1023
78 x 1023
4.7 x 1025
Determine the number of moles of Alumium is a sample that
contains 4.56 x 1026 particles.(remember to always put
your values in parentheses)
757 moles
0.031 moles
6.022 x 1023 moles
27 moles
The mass of 1 mole of any...