<u>Answer:</u> The amount of heat required for melting of benzene is 20.38 kJ
<u>Explanation:</u>
The processes involved in the given problem are:
- <u>For process 1:</u>
To calculate the amount of heat required to melt the benzene at its melting point, we use the equation:
where,
= amount of heat absorbed = ?
m = mass of benzene = 91.5 g
= enthalpy change for fusion = 127.40 J/g
Putting all the values in above equation, we get:
- <u>For process 2:</u>
To calculate the amount of heat absorbed at different temperature, we use the equation:
where,
= specific heat capacity of benzene = 1.73 J/g°C
m = mass of benzene = 91.5 g
= final temperature = 60.6°C
= initial temperature = 5.5°C
Putting values in above equation, we get:
Total heat absorbed =
Total heat absorbed =
Hence, the amount of heat required for melting of benzene is 20.38 kJ