Question

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

Answer 1

`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.

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