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Nataly [62]
2 years ago
13

How many grams of ethanol, C₂H,OH, can be boiled with 564.1 kJ of heat energy? The molar heat of vaporization of ethanol is

Chemistry
1 answer:
nydimaria [60]2 years ago
3 0

Answer: 672.2 grams

Explanation:

With 564.1 kJ of heat energy, 564.1/38.6=14.613989637306 moles of ethanol can be combusted.

So, we need to find the formula mass of ethanol.

  • The atomic mass of carbon is 12 g/mol.
  • The atomic mass of oxygen is 16 g/mol.
  • The atomic mass of hydrogen is 1 g/mol.
  • So, the formula mass of ethanol is 2(12)+6(1)+16=46 g/mol.

Therefore, the mass of ethanol is (46)(14.613989637306)=672.2 grams.

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<h3>Mole ratios:</h3><h3 />

In chemistry, one the most crucial branches is stoichiometry, which allows us to perform calculations with grams, moles and particles (atoms, molecules and ions). It is based on the concept of mole ratios, whereby the moles of a specific substance can be converted to moles of another one, say product to reactant, reactant to reactant, reactant to product and product to product.

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