how much energy is needed to heat 50 grams of ethanol
From what temperature to what temperature? How much ethanol?
If you are not vaporizing it, multiply the mass of ethanol by the specific heat of the liquid and the temperature increase.
ethanol specific heat = 2.44 kJ/(kg·K)
To calculate the energy needed to heat a substance, you need to know its specific heat capacity and the change in temperature.
The specific heat capacity (often denoted as "C") is the amount of energy required to raise the temperature of one gram of a substance by one degree Celsius (or one Kelvin). For ethanol, the specific heat capacity is commonly given as 2.44 J/g·°C.
The formula to calculate the amount of energy needed is:
Energy = mass × specific heat capacity × change in temperature
Given that the mass of ethanol is 50 grams, you will also need to know the change in temperature. Let's assume it is a 10-degree Celsius increase.
Plugging the values into the formula, you get:
Energy = 50 g × 2.44 J/g·°C × 10°C
Simplifying the equation:
Energy = 1,220 Joules
Therefore, you would need 1,220 Joules of energy to heat 50 grams of ethanol by 10 degrees Celsius.