Calculate the amount of heat needed to melt 91.5g of solid benzene ( C6H6 ) and bring it to a temperature of 60.6°C . Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol.

The amount of heat required for melting of benzene is 20.38 kJ

Explanation:

The processes involved in the given problem are:

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:

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

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