How much heat (in kJ) is required to warm 13.0 g of ice, initially at -10.0 ∘C, to steam at 109.0 ∘C? The heat capacity of ice is 2.09 J/g⋅∘C and that of steam is 2.01 J/g⋅∘C.

Trichloroethane, C2H3Cl3 is used as a degreaser (solvent for waxes and oils). Its density is 1.435 g/mL and its vapor pressure at 20C is 124 mm Hg. (a) How many mL will vaporize in an evacuated 1.50-L flask at 20C? (b) A 3.00-mL sample is poured into an evacuated 1.5-L flask at 20C. Will all the liquid vaporize? If not, what is the pressure in the flask? (c) A similar 3.00-mL sample is poured into an evacuated 20.00-L flask at 20C. What physical state(s) is/are in the flask?

Explain why 15 g of steam at 100C melts more ice than 15 g of liquid water at 100C.

The molar heat of fusion of sodium metal is 2.60 kJ/mol, whereas its heat of vaporization is 97.0 kJ/mol. a. Why is the heat of vaporization so much larger than the heat of fusion? b. What quantity of heat would be needed to melt 1.00 g sodium at its normal melting point? c. What quantity of heat would be needed to vaporize 1.00 g sodium at its normal boiling point? d. What quantity of heat would be evolved if 1.00 g sodium vapor condensed at its normal boiling point?