Answer:
First question

Second question

Explanation:
From the question we are told that
The melting point of Ethanol is 
The boiling point of Ethanol is 
The enthalpy of fusion of Ethanol is 
The enthalpy of vaporization of Ethanol is 
The specific heat of solid Ethanol is 
The specific heat of liquid Ethanol is 
The mass of the Ethanol given is 
Considering the first question
The initial temperature is 
The final temperature is 
Generally the heat required too raise the Ethanol to its boiling point is mathematically represented as

=> 
=> 
Genially the number of moles of Ethanol given is mathematically represented as

Here Z is the molar mass of Ethanol with value 
So

=> 
Generally the heat of vaporization of the Ethanol is mathematically represented as

=>
=> 
Generally the heat required too raise the Ethanol from its boiling point to
is mathematically represented as

=> 
=> 
Generally the total heat required is

=> 
=> 
Considering the second question
The initial temperature is 
The final temperature is 
Generally the heat required too raise the Ethanol to its melting point is mathematically represented as

=> 
=> 
Generally the heat of fusion of the Ethanol is mathematically represented as

=>
=> 
Generally the heat required too raise the Ethanol to its boiling point is mathematically represented as

=> 
=> 
Generally the heat of vaporization of the Ethanol is mathematically represented as

=>
=> 
Generally the heat required too raise the Ethanol from its boiling point to
is mathematically represented as

=> 
=> 
Generally the total heat required is

=> 
=> 