A burning match and a bonfire may have the same temperature, yet you would not sit around a burning match on a fall evening to stay warm. Why not?
Expert Solution & Answer
Interpretation Introduction
Interpretation:
On a fall evening to stay warm, one would prefer to sit around bonfire not around a burning match, though both might have same temperature. An explanation is required for the given statement.
Concept introduction:
The exchange of thermal energy of an object occurs in the form of energy, which is called heat.
The thermal energy is a kind of kinetic energy that is associated to the atoms and the molecule. The thermal energy is dependent on the state and nature of a substance.
Answer to Problem 1E
The quantity or amount of heat generated by the matchstick is less than that of a bonfire.
Explanation of Solution
A matchstick and the logs used in the bonfire are made of wood, so they have same thermal conductivity value. The amount of wood used in a matchstick is very less as compared to the wooden logs used in a bonfire. So, the heat generated by the matchstick is very less as compared to that of bonfire.
Conclusion
On the evening fall to keep ourselves warm, we prefer to sit near the object which produces more heat. Therefore, one would not prefer to sit near the matchstick.
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How many signals do you expect in the H NMR spectrum for this molecule?
Br
Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red.
Note for advanced students: In this question, any multiplet is counted as one signal.
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
No additional Hs to color in top
molecule
For the molecule in the bottom drawing area, highlight in red any other H atoms that will
contribute to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
No additional Hs to color in bottom
molecule
In the drawing area below, draw the major products of this organic reaction:
1. NaOH
?
2. CH3Br
If there are no major products, because nothing much will happen to the reactant under these reaction conditions, check the box under the drawing area
instead.
No reaction.
Click and drag to start drawing a
structure.
☐ : A
ค
Predict the major products of the following organic reaction:
NC
Δ
?
Some important Notes:
• Draw the major product, or products, of the reaction in the drawing area below.
• If there aren't any products, because no reaction will take place, check the box below the drawing area instead.
• Be sure to draw bonds carefully to show important geometric relationships between substituents.
Note: if your answer contains a complicated ring structure, you must use one of the molecular fragment stamps (available in the menu at right) to enter the
ring structure. You can add any substituents using the pencil tool in the usual way.
Click and drag to start drawing a
structure.
Х
а
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY