A 54 cm 2 ice cube at −25.0 °C is added to a thermally insulated container with 400.0 mL H 2 O(l) at 32.0 °C. What will be the final temperature in the container and what state(s) of matter will be present? (Specific heats: H 2 O (s), 2.01 J g-1° C-1; H 2 O (l), 4.18 J g °C-1. Densities: H 2 O (s), 0.917 g/cm 2 ; H 2 O (l), 0.998 g/cm 2 , Also, Δ a q H of ice = 6.01 kJ mol-1.)
A 54 cm 2 ice cube at −25.0 °C is added to a thermally insulated container with 400.0 mL H 2 O(l) at 32.0 °C. What will be the final temperature in the container and what state(s) of matter will be present? (Specific heats: H 2 O (s), 2.01 J g-1° C-1; H 2 O (l), 4.18 J g °C-1. Densities: H 2 O (s), 0.917 g/cm 2 ; H 2 O (l), 0.998 g/cm 2 , Also, Δ a q H of ice = 6.01 kJ mol-1.)
A 54 cm2 ice cube at −25.0 °C is added to a thermally insulated container with 400.0 mL
H
2
O(l)
at 32.0 °C. What will be the final temperature in the container and what state(s) of matter will be present? (Specific heats:
H
2
O
(s), 2.01 J g-1° C-1;
H
2
O
(l), 4.18 J g °C-1. Densities:
H
2
O
(s), 0.917 g/cm2;
H
2
O
(l), 0.998 g/cm2, Also,
Δ
a
q
H
of ice = 6.01 kJ mol-1.)
Definition Definition Substance that constitutes everything in the universe. Matter consists of atoms, which are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction: solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
3. Consider the compounds below and determine if they are aromatic, antiaromatic, or
non-aromatic. In case of aromatic or anti-aromatic, please indicate number of I
electrons in the respective systems. (Hint: 1. Not all lone pair electrons were explicitly
drawn and you should be able to tell that the bonding electrons and lone pair electrons
should reside in which hybridized atomic orbital 2. You should consider ring strain-
flexibility and steric repulsion that facilitates adoption of aromaticity or avoidance of anti-
aromaticity)
H H
N
N:
NH2
N
Aromaticity
(Circle)
Aromatic Aromatic Aromatic Aromatic Aromatic
Antiaromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic
nonaromatic nonaromatic nonaromatic nonaromatic nonaromatic
aromatic TT
electrons
Me
H
Me
Aromaticity
(Circle)
Aromatic Aromatic Aromatic
Aromatic Aromatic
Antiaromatic Antiaromatic Antiaromatic Antiaromatic Antiaromatic
nonaromatic nonaromatic nonaromatic nonaromatic nonaromatic
aromatic πT
electrons
H
HH…
A chemistry graduate student is studying the rate of this reaction:
2 HI (g) →H2(g) +12(g)
She fills a reaction vessel with HI and measures its concentration as the reaction proceeds:
time
(minutes)
[IH]
0
0.800M
1.0
0.301 M
2.0
0.185 M
3.0
0.134M
4.0
0.105 M
Use this data to answer the following questions.
Write the rate law for this reaction.
rate
= 0
Calculate the value of the rate constant k.
k =
Round your answer to 2 significant digits. Also be
sure your answer has the correct unit symbol.
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Viscosity, Cohesive and Adhesive Forces, Surface Tension, and Capillary Action; Author: Professor Dave Explains;https://www.youtube.com/watch?v=P_jQ1B9UwpU;License: Standard YouTube License, CC-BY