The answer is b) similar chemical properties but very different atomic numbers
The reaction proceeds through nucleophilic acyl substitution reaction.
Phenyl magnesium bromide substitutes one ethoxide ion in the nucleophilic acyl substitution reaction that drives the process forward. A subsequent equivalent of phenyl magnesium bromide produces triphenyl methanol through a nucleophilic addition reaction with the resultant keto group.
There are two ethoxy leaving groups in diethyl carbonate. Tertiary alcohol is created when diethyl carbonate combines with too much Grignard reagent. The Grignard reagent attacks the carbonyl carbon three times in the mechanism to produce the tertiary alcohol.
The mechanism is shown below:
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From the calculations, the heat of the reaction is 44.4 kJ/mol.
<h3>What is the enthalpy of reaction?</h3>
The enthalpy of reaction refers to the amount of heat that is absorbed or evolved in a reaction.
Number of moles of NaOH = 1.1 g /40 g/mol = 0.0275 moles
Mass of the water = 22.1 mL or 22.1 g
Given that;
H= mcdT
H = 22.1 g *4.184 * (31.4 - 18.2)
H = 1221 J or 1.221kJ
ΔH rxn = -(1.221kJ)/0.0275 moles
ΔH rxn = 44.4 kJ/mol
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Answer:
Heat energy (Q) = 334.72
Explanation:
Volume = 4mL
Initial temperature (T1) = 10°C
Final temperature (T2) = 30°C
Mass = ?
Specific heat capacity of water = 4.184J/g°C
Density of water = 1.0g/mL
Heat energy = ?
Density = mass / volume
ρ = mass / vol
Mass = volume × density (ρ)
Mass = 4 × 1.0
Mass = 4g
Heat energy (Q) = mc∇T
Q = heat energy
M = mass of the substance
C = specific heat capacity of the substance
∇T = change in temperature of the substance = T2 - T1
Q = mc(T2 - T1)
Q = 4 × 4.184 ×(30 - 10)
Q = 16.736 × 20
Q = 334.72J
The heat energy required to raise 4ml of water from 10°C to 30°C is 334.72J
