The correct answer option is A) benzene.
<u>Explanation:</u>
Benzene is an organic chemical compound (hydrocarbon), consisting of 6 carbon atoms and 6 hydrogen atoms.
Out of all the given options, Benzene will solidify the earliest before reaching a temperature of 0 degree Celcius, when cooled.
The reason being that it has a freezing temperature of 5.5 degree Celcius while all other substances have their freezing points which are below 0 degree Celcius.
Warm is less heaver then cold air so warm air rise and cold air sinks
Answer:
The percentage of volume of ethanol is 35%.
<u>Explanation:</u>
The percentage of volume of ethanol is calculated by
Percent of volume of ethanol = (volume of X / total volume) * 100
We are going to assume these volumes will be added together to make 100mL.
Percent volume of Ethanol = (volume of ethanol / total volume) * 100
= 35mL / 100mL * 100
= 35%
Answer:
ΔS = 4.1 J/K
Explanation:
Enthalpy (H) is defined as the amount of energy released or absorbed during a chemical reaction.
Entropy (S) defines the degree of randomness or disorder in a system.
The relationship between both parameters is given as;
ΔS = ΔH / T
ΔH = 26.7 KJ/mol for 1 mol of diethyl ether
number of moles = mass / molar mass
number of moles = 3.4 / 72 = 0.04722
ΔH = 26700 * 0.04722 = 1260.77 J
T = 34.6 + 273 = 307.6 (upon converting to kelvin temperature)
ΔS = 1260.77 / 307.6
ΔS = 4.1 J/K