[Ax3shr3dd3r]

For silver, the molar heat capacity(C_p) is equal to 23.43 + 0.00628 T. Calculate the ΔH for the melting of 3 moles of silver from 25°C to 961°C under 1 atm.

From looking through my text, I found this:

ΔH = ΔE + PΔV but at constant pressure it is: ΔH=q

Then to find q(heat): q= mass x Specific heat x ΔT
Being as melting is endothermic process q is positive.

So, would I just plug into what I got? Using 323.61g as its the mass of 3 moles of Ag?
I feel I'm missing something as I've no clue what the molar heat capacity provided is used for.
Any help is appreciated.

[Borek]

Actually you can't calculate ΔH for melting from the data given, only amount of heat required to get to the melting point.

What is the definition of the molar heat capacity? How does it differ from the specific heat capacity?

[Enthalpy]

...melting of 3 moles of silver from 25°C to 961°C under 1 atm.

This text doesn't look complete.

[Ax3shr3dd3r]

Actually you can't calculate ΔH for melting from the data given, only amount of heat required to get to the melting point.

What is the definition of the molar heat capacity? How does it differ from the specific heat capacity?

The molar heat capacity refers to the amount of heat required to raise 1 mole of a substance by 1°C, whereas specific heats capacity refers to the amount of heat required to raise 1 gram of a substance by 1°C.

May I ask what is needed to calculate ΔH for melting?

[Ax3shr3dd3r]

...melting of 3 moles of silver from 25°C to 961°C under 1 atm.

This text doesn't look complete.

I doesn't? Well I copied it just how it is in the worksheet of questions my professor gave us. They do contain problem he made himself so that could be a problem but what's in my first post is all the problem gives =|. I guess my professor perhaps failed in his chemistry problem producing? Haha

[Enthalpy]

May I ask what is needed to calculate ΔH for melting?

It can't be computed from the heat capacity.
Hence the question, if you seek the melting heat or rather the heat to bring the substance to its melting point.

[Ax3shr3dd3r]

May I ask what is needed to calculate ΔH for melting?

It can't be computed from the heat capacity.
Hence the question, if you seek the melting heat or rather the heat to bring the substance to its melting point.

Lets go with the heat to bring the substance to its melting point.