Problem: Assume that the values given here for 1 mole of methanol are constant over the relevant temperature ranges.Melting Point: 176 KBoiling Point: 338 KHfus: 2.2 kJ/mol KHvap: 35.2 kJ/mol KCs,solid: 105 J/mol KCs,liquid: 81.3 J/mol KCs,gas: 48 J/mol KGiven the heating curve for 1 mole of methanol beginning at 170 K and ending at 350 K answer the following questions:What is the value of qliquid for methanol?

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Heat required to change the temperature of a substance without changing its physical state is given by:

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Problem Details
Assume that the values given here for 1 mole of methanol are constant over the relevant temperature ranges.

Melting Point: 176 K

Boiling Point: 338 K

Hfus: 2.2 kJ/mol K

Hvap: 35.2 kJ/mol K

Cs,solid: 105 J/mol K

Cs,liquid: 81.3 J/mol K

Cs,gas: 48 J/mol K

Given the heating curve for 1 mole of methanol beginning at 170 K and ending at 350 K answer the following questions:

A graph of heat added, in kilojoules per mole, versus temperature, in kelvins. The graph is composed of five line segments. The first represents heating the solid, it starts at (0,170), and ends at (.6,176). Segment two represents the solid melting, and starts at (.6,176), and ends at (2.8,176). Segment three represents the liquid being heated, it starts at (2.8, 176), and ends at (16, 338). Segment four represents the liquid being vaporized, it starts at (16,338), and ends at (51.2,338). Segment five represents the vapor heating, it starts at (51.2,338), and ends at (51.8,350).


What is the value of qliquid for methanol?