Construct a cooling curve (looks the same as a heating curve) for a substance with a molar mass of 200 that has a gas phase specific heat capacity of 2.9J/g K, a boiling point of 525 K,a liquid phase specific heat capacity of 3.24 J/g K, a freezing point of 352 K, a solid phase specific heat capacity of 3.3 J/g K and molar enthalpies of fusion and condensation of -14.3 kJ/mol and -46.4 kJ/mol.
I know that a diagram of the cooling curve cannot be posted on this forum, but here is what I got on the diagram:
x-axis: Heat Removed --->
y-axis: Temperature (K)
The curve starts with a negative slope line (gas) and then stays constant
(boiling point) and then the line goes goes down with a negative slope ( liquid) and then stays constant (freezing point) and then goes down with a negative slope (solid) and finally stays constant.
The heat required to condense 200 g of a substance is -9,280 kJ ( is this correct?).
The heat required to melt 200 g of a substance is -2,860 kJ (is this correct?).
The heat required to change a 200 g substance to a liquid phase with a liquid phase specific heat capacity of 3.24 J/g K from 525 K to 352 K is 112 KJ (is this correct?).
I do not know if I am supposed to find the q for the gas phase and the solid. If so, how do I find it. I know that I have to use the q= m cs delta T but I don't know what is the final temperature of the gas phase and the initial temperature of the solid phase.
Thank you.