Why do substances with weak intermolecular forces form solids at low melting points?
1 answer:
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Answer:
15.24 J is the change in internal energy for this process.
Explanation:
According to the first law of thermodynamics:-
Where,
U is the internal energy
q is the heat
w is the work done
From the question,
q = + 75 J
(+ sign as the heat is being absorbed)
The expression for the calculation of work done is shown below as:
Where, P is the pressure
is the change in volume
From the question,
= 2.00 - 1.40 L = 0.60 L
P = 1.02 atm
Also, 1 atmL = 101.3 J
So,
(work is done by the system)
So,
<u>15.24 J is the change in internal energy for this process.</u>