Energy required to make 2.0 kg of steam

[LonelyElectron]

Homework Statement

A container holds 8.0 kg of water at 25 ˚C. How much energy must be added to the water to create 2.0 kg of steam?

Homework Equations

To be honest, not sure. SO MANY equations were given, and I don't know what is a variation of what.

The Attempt at a Solution

Q_total = Q_warm water + Q_boil water
=mc_wt+m_sL_v
= (8.0 kg)(4200 J/(kg* degrees C))(100 degrees C - 25 degrees C)+(2.0 kg)(2.3x10^6)
=2520000 J + 4600000 J
=7120000 J
=7.1 x 10^6 J

Therefore 7.1 x 10^6 J of heat energy have to be added to the water to create 2.0 kg of steam.

Does that make any sense?

 

[kuruman]

Does that make any sense?

Yes, it makes a lot of sense.

 

[LonelyElectron]

Yes, it makes a lot of sense.

Okay perfect! So its correct? You guys are the best. I hope you know how much your help is appreciated!

 

[kuruman]

So its correct?

Yes, it's correct.