## Heat Capcity for Water

Lauryn Jordan 1F
Posts: 76
Joined: Fri Sep 29, 2017 7:07 am

### Heat Capcity for Water

How do you know which heat capacity to use for water?

Hannah Krusenoski 2L
Posts: 31
Joined: Fri Sep 29, 2017 7:06 am

### Re: Heat Capcity for Water

I believe water always has a heat capacity of 4.184 J/g°C

Chris Lamb 1G
Posts: 58
Joined: Fri Jun 23, 2017 11:39 am

### Re: Heat Capcity for Water

There are different heat capacities for different states, so you need to know the waters's state. Also, you have molar heat capacity as well as specific heat capacity, and the one you choose depends on the units of your given information.

Humza_Khan_2J
Posts: 56
Joined: Thu Jul 13, 2017 3:00 am

### Re: Heat Capcity for Water

Bouncing off of the last commenter, the problem should give you which phase the water is in. If it it transitioning from phase to phase, you would have to use either the enthalpy of fusion or the enthalpy of vaporization.

Qining Jin 1F
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

### Re: Heat Capcity for Water

Specific heat capacity for water(solid) is 2.03 J/g°C, water(liquid) is 4.184 J/g°C, and water(vapor) is 2.01 J/g°C

Yea Eun Lee 1H
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

### Re: Heat Capcity for Water

We'll be given those values for the test, right?

Wenting Hu 2H
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

### Re: Heat Capcity for Water

Yes, it's on the constants and formula sheet on his website.

504754253
Posts: 45
Joined: Fri Jun 23, 2017 11:39 am

### Re: Heat Capcity for Water

will the heat capacity alway be given

Anne 2L
Posts: 35
Joined: Fri Sep 29, 2017 7:05 am

### Re: Heat Capcity for Water

Yes, the heat capacity should always be given. I don't think we have the means to calculate heat capacity outside of a lab setting.

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