How much heat (in kJ) is requi

1. How much heat (in kJ) is required to convert 423 g of liquid H2O at 24.8°C into steam at 147°C? (Assume that the specific heat of liquid water is 4.184 J/g·°C, the specific heat of steam is 2.078 J/g·°C, and that both values are constant over the given temperature ranges. The normal boiling point of H2O is 100.0°C.)
kJ

2. Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 59.2°C, the vapor pressure of CCl4 is 58.9 kPa, and its enthalpy of vaporization is 29.82 kJ/mol. Use this information to estimate the normal boiling point (in °C) for CCl4.

°C

How much heat (in kJ) is requi

4. Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 59.2°C, the vapor pressure of CCl4 is 58.9 kPa, and its enthalpy of vaporization is 29.82 kJ/mol. Use this information to estimate the normal boiling point (in °C) for CCl4.

°C
5. How much heat (in kJ) is required to convert 423 g of liquid H2O at 24.8°C into steam at 147°C? (Assume that the specific heat of liquid water is 4.184 J/g·°C, the specific heat of steam is 2.078 J/g·°C, and that both values are constant over the given temperature ranges. The normal boiling point of H2O is 100.0°C.)

kJ
6.

From the phase diagram for water (figure below), determine the state of water at the following.
(a)
34°C and 83 kPa
solidliquid    gas
(b)
0.01°C and 0.2 kPa
solidliquid    gas
(c)
−10°C and 24 kPa
solidliquid    gas
(d)
195°C and 96 kPa
solidliquid    gas
(e)
42°C and 117 kPa
solidliquid    gas
(f)
85°C and 10 kPa
solidliquid    gas
6. dentify the type of crystalline solid (metallic, covalent network, ionic, or molecular) formed by each of the following substances.
(a)
Au
metalliccovalent network    ionicmolecular
(b)
B
metalliccovalent network    ionicmolecular
(c)
NH4Cl
metalliccovalent network    ionicmolecular
(d)
S8
metalliccovalent network    ionicmolecular
(e)
CCl4
metalliccovalent network    ionicmolecular
(f) Na3PO4
metalliccovalent network    ionicmolecular
(g)
C6H6
metalliccovalent network    ionicmolecular
(h)
MgSO4
metalliccovalent network    ionicmolecular
(i)
C (diamond)
metalliccovalent network    ionicmolecular
8. Classify each substance in the table as either a metallic, covalent network, ionic, or molecular solid.

Substance Appearance Melting Point Electrical Conductivity Solubility in Water
X shiny, malleable 1907°C high insoluble
Y brittle, white 734°C only if melted/dissolved soluble
Z hard (not brittle), colorless 1722°C none insoluble
Substance X

metalliccovalent network    ionicmolecular
Substance Y

metalliccovalent network    ionicmolecular
Substance Z

metalliccovalent network    ionicmolecular

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