The thermal energy from the soup is transferred to Greg's hands.
684 kcal. One mole of glucose weighs roughly 180g. Given that 1g of glucose releases 3.8 kcal, we calculate for 1 mole of glucose: 180g -> 180g * 3.8 kcal/g = 684 kcal.
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)
Co2 is indeed the correct answer, my friend.
A molecule's polarity is influenced not only by specific atoms but also by its symmetry. For instance, alkanes are typically non-polar due to the absence of a net dipole moment. A dipole moment occurs because of differences in electronegativity between carbon and other elements, commonly oxygen, halogens, and nitrogen, which, due to their high electronegativity, create a net dipole moment and thus polarity.
exhibits symmetry and is therefore non-polar.
, being asymmetrical, is polar due to its bent structure influenced by the oxygen's lone pairs.
