Using 273.15 K as the value for Zero degree Celsius convert 45.1° C to Kelvin. 6.05 K 318 K 318.3 K 1.23 x 104 K
1 answer:
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<h3><u>Full Question:</u></h3>
The following compound has been found effective in treating pain and inflammation (J. Med. Chem. 2007, 4222). Which sequence correctly ranks each carbonyl group in order of increasing reactivity toward nucleophilic addition?
A) 1 < 2 < 3
B) 2 < 3 < 1
C) 3 < 1 < 2
D) 1 < 3 < 2
<h3><u>Answer: </u></h3>The rate of nucleophilic attack of carbonyl compounds is 2<3 <1.
Option B
<h3><u>Explanation. </u></h3>Nucleophilic attack is explained as the attack of an electron rich radical to a carbonyl compound like aldehyde or a ketone. A nucleophile has a high electron density, so it searches for a electropositive atom where it can donate a portion of its electron density and become stable.
A carbonyl compound is a hybridized carbon atom with a double bonded oxygen atom in it. The oxygen atom pulls a huge portion of electron density from carbon being very electropositive.
In a ketone, there are two factors that make it less likely to undergo a nucleophilic attack than aldehyde. Firstly, the steric hindrance of two carbon groups being attached with the carbonyl carbon makes it harder for the nucleophile to approach. Secondly, the electron push by the carbon groups attached makes the carbonyl carbon a bit less electropositive than the aldehyde one. So aldehydes are more reactive towards a nucleophilic addition reaction.
Answer : The value of of the gas is 2.79 Joules.
Explanation :
First we have to calculate the moles of helium.
Molar mass of helium = 4 g/mole
Now we have to calculate the heat.
Formula used :
where,
q = heat
n = number of moles of helium gas = 0.0125 mole
= specific heat of helium = 20.8 J/mol.K
= initial temperature = 310.0 K
= final temperature = 235.0 K
Now put all the given values in the above formula, we get:
Now we have top calculate the work done.
Formula used :
where,
w = work done
p = pressure of the gas = 1 atm
= initial volume = 1.21 L
= final volume = 0.99 L
Now put all the given values in the above formula, we get:
conversion used : (1 L.atm = 101.3 J)
Now we have to calculate the value of of the gas.
Therefore, the value of of the gas is 2.79 Joules.