The following information is given for ethanol at 1 atm: Boiling point = 78.40°C   Heat of vaporization = 200.0 cal/g Melting point = –114.5°C   Heat of fusion = 26.04 cal/g Specific heat gas = 0.3418 cal/g°C Specific heat liquid = 0.5880 cal/g°C A 22.80 g sample of liquid ethanol is initially at –68.20°C. How many kcal of energy must be added to the sample to raise its temperature to 94.20°C? Energy added = kcal

Please answer both questions. 32. How much heat (in kJ) is absorbed in the process of making 0.813 mol of CF₄ from the following reaction? C (s) + 2 F₂ (g) → CF₄ (g) ∆H° = 141.3 kJ/mol 47. Given that water has a specific heat capacity of 4.184 J/g°C, calculate the amount of heat (J) to raise the temperature of 250.0 g (about one glass) of water 34.00°C.

Select the compound that will have the higher equilibrium vapor pressure based on predicted intermolecular forces. pentane (C5H12) iodine pentafluoride

The enthalpy for boiling water is 40.7 kJ/mol. What is the quantity of heat (in kJ) required to boil 418.1 g of water?

What is a phase change? Construct a heating-cooling curve for a substance that freezes at –23.0°C and has a boiling point of 67.0°C. Name all possible changes that can occur among the vapor, liquid, and solid phases of this substance, and name the four phase change enthalpies involved. Indicate whether these changes are exothermic or endothermic

The enthalpy for boiling water is 40.7 kJ/mol. How much heat is required to boil 820.1 g of water?

How much heat in kilocalories is absorbed when 22.0 g of 2-propanol evaporates after being rubbed on the skin? The heat of vaporization of 2-propanol is 159 cal/g.

Methylamine has a vapor pressure of 344 torr at -25 °C and a boiling point of -6.4 °C. Find ΔHvap for methylamine.

Essential oils are concentrated liquid containing metabolites extracted from plant sources and are widely used in the production of perfumes. The structures of some of these compounds present in essential oils, along with acetone, are presented below. CH3 H2C CH H2 H3CO, CH2 CH H2C H2C CH FCH2 HO H3C CH2 Compound A MM: 164.2 g/mol Boiling Point: 254 C Compound B MM: 162.19 g/mol Boiling Point: 232 C Compound C MM: 136.24 g/mol Boiling Point: 176 C Determine the most possible boiling point of each of the compounds. Refer to the possible boiling points listed above. An equal volume of COMPOUNDS A, B and C were stored in separate beakers which were left uncovered at room temperature. 1. 2. If the three liquids were allowed to stand for about 10 minutes, which of the following will have the least amount of liquid b. What physical property is the basis of the answer? Among the three liquids, what is the most recommended ingredient of a perfume that will have the most lasting scent? а.…