Adding mass of solute? (1 Viewer)

[qianjixin]

When calculating the heat of solution, do we include the solute in the value for m in ΔH=-mCΔT?

Like if I dissolve 5g of NaCl in 100g of water, would m=105g?

 

[Thief]

Nope.

 

[golgo13]

The mass is generally just the water, some teachers would tell you it is the combined weight but most of the time you will find it just the water

 

[such_such]

I do, many people do, some don't, but the teacher doesn't care. It's technically both the same, so you'll have to ask the teacher. Saying that, most textbooks would add the solute.

 

[Thief]

Yeah at my school we've always been taught to just have the mass of water, and not add the solute. Just ask your teacher.

 

[someth1ng]

m=mass of water

 

[Sindivyn]

You do NOT calculate the mass of the solute, the value of C is specific to water only.