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------------------------------------------------ How many grams of ethanol. C,H,OH, can be boiled with 762.4 KJ of heat energy? The molar heat of vaporization of ethanol is 38.6 kJ/mol mass of ethanol:

Question

High School

Answer :

ErgoBoden ErgoBoden · Answer 1 · 2023-12-20T17:02:37-05:00

The mass of ethanol that can be boiled with 762.4 KJ of heat energy is approximately 19.75 grams.

To calculate the mass of ethanol that can be boiled with a given amount of heat energy, we can use the equation:

mass = (heat energy)/(molar heat of vaporization)

First, we need to convert the given heat energy from kilojoules (KJ) to joules (J) by multiplying it by 1000:

762.4 KJ * 1000 = 762400 J

Next, we can substitute the values into the equation:

mass = 762400 J / 38.6 kJ/mol

Now, we need to convert the molar heat of vaporization from kilojoules per mole (kJ/mol) to joules per mole (J/mol) by multiplying it by 1000:

38.6 kJ/mol * 1000 = 38600 J/mol

Finally, we can calculate the mass of ethanol:

mass = 762400 J / 38600 J/mol

mass ≈ 19.75 grams

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