Ethanol is warmed from 4.5C to 50.2C, how much energy was required?

Insufficient information has been given. You have to know the mass (m) in grams of the ethanol and its specific heat.

Refer to: http://www2.ucdsb.on.ca/tiss/stretton/database/specific_heat_capacity_table.html
Specific heat of ethanol (ethyl alcohol) = 2.460 J/(g°C)

Energy required
= m c ΔT
= m × 2.460 × (50.2 - 4.5) J
= 112.422m J