Explain the observed trend in the boiling points of these compounds.H2Te                    -2 °CH2Se                    -41.5 °CH2S                      -60.7 °CH2O                      100 °C

How much heat energy is required to convert 69.8 g69.8 g of solid iron at 24 ∘C24 ∘C to liquid iron at 1538 ∘C?1538 ∘C? The molar heat of fusion of iron is 13.8 kJ/mol. Iron has a normal melting point of 1538 ∘C.1538 ∘C. The specific heat capacity of solid iron is 0.449 J/(g·∘C).

Determine the normal boiling point of a substance whose vapor pressure is 55.1 mm Hg at 35°C and has a  ⃤ Hvap of 32100 J/mol.

For pentane, the AH° of vaporization is 26.22 kJ/mol and the AS° of vaporization is 87.88 J/ mol K. At 1.00 atm, what is the boiling point of pentane, in K?

According to this phase diagram, the normal boiling point of the substance in degree Celsius is:     100     114     0.118     184

The enthalpy of vaporization for acetone is 32.0 kj/mol. the normal boiling point (at 1.00 atm) for acetone is 56.5 C. What is the temperature of acetone at 560 torr?