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2 votes
Determine how much energy is needed to change 50 g of liquid water at 100°C to steam.

13,000J


113,000J


-113,000J


-130J

User Angeant
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8.2k points

1 Answer

6 votes

Answer:


Q=113,000J

Step-by-step explanation:

Hello there!

In this case, since the vaporization process is carried out in order to turn a liquid into a gas due to the addition of heat, we can use the following heat equation involving the heat of vaporization of water or any other substance:


Q=m*\Delta _(vap)H

Thus, since this heat of vaporization for water is 2259.36 J/g, we plug in this amount to obtain the total energy for this process.


Q=50*2259.36 J/g\\\\Q=113,000J

Which is positive due to the necessity of heat.

Regards!

User Tcole
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7.9k points
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