Ethanol (density = 0.789 g/ml) combusts and produces 34.8 g h2o. what was the original volume of the ethanol?

Answer : The original volume of the ethanol is 37.5 mL

Explanation :

The balance chemical reaction will be,

First we have to calculate the moles of .

Now we have to calculate the moles of ethanol.

From the balanced reaction we conclude that,

As, 3 moles of produce from 1 mole of ethanol

So, 1.93 moles of produce from mole of ethanol

Now we have to calculate the mass of ethanol.

Now we have to calculate the volume of ethanol.

Therefore, the original volume of the ethanol is 37.5 mL

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

the answer is the first option

explanation:

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