Answer:
Can you rank the following chemical substances in order of their absolute entropies (So) from lowest (1) to highest (5) at a temperature of 298 K?
a. Al (s)
b. H2O (l)
c. HCN (g)
d. CH3COOH (l)
e. C2H6 (g)
Explanation:
Entropy quantifies the level of disorder within a system.
In solids, the entropy is significantly lower compared to liquids and gases.
The typical order of entropy is:
solids < liquids < gases
In the substances listed, liquid water notably exhibits strong intermolecular hydrogen bonding.
This results in water having comparatively lower entropy.
Next in line is acetic acid.
Among the gaseous components, ethane has higher entropy than HCN due to its weaker intermolecular interactions.
HCN involves some hydrogen bonding.
Thus, the order of entropy is:
Al(s) < CH3COOH (l) < H2O(l) < HCN(g) < C2H6(g)
Answer: The complete balanced chemical equation is,
Explanation:
A chemical equation represents the reactants on the left and the products on the right, separated by a right-pointing arrow indicating the reaction.
This representation includes the phases of the substances and uses subscripts and superscripts for numbers.
For the reaction given, the balanced chemical equation with phases is:
Chromatography is the method recommended for separating the two amino acids, glycine and alanine.
The responses to the question are: a. True b. True c. True d. False Explanation: The relevant relationship is given as the gas constant R, with T being the temperature in Kelvin, and m being the molecular mass, while represents the root mean square speed. Evaluating the kinetic energy equations lead us to the conclusion that: a. Increasing the temperature of a gas sample raises root-mean-square speed, hence true. b. At the same temperature, gases share equal average kinetic energy; thus true. c. When gas temperatures rise, the count of particles with average kinetic energy increases, affirming true. d. However, equal temperature does not ensure identical root-mean-square speeds due to varying molecular masses in different gases, which leads to this statement being false.
