Q4 a) The following information is given for silver at 1atm: boiling point = 2212 °C Hvap(2212 °C) = 254 kJ/mol melting point = 961 °C Hfus(961 °C) = 12.0 kJ/mol specific heat solid= 0.238 J/g°C specific heat liquid = 0.285 J/g°C _______kJ are required to melt a 47.5 g sample of solid silver, Ag, at its normal melting point. b) The following information is given for manganese at 1atm: boiling point = 2095 °C Hvap(2095 °C) = 225 kJ/mol melting point = 1244 °C Hfus(1244 °C) = 14.6 kJ/mol specific heat solid= 0.477 J/g°C specific heat liquid = 0.837 J/g°C What is H in kJ for the process of freezing a 25.5 g sample of liquid manganese at its normal melting point of 1244 °C. _______kJ c) The following information is given for antimony at 1atm: boiling point = 1440 °C Hvap(1440 °C) = 195 kJ/mol melting point = 631 °C Hfus(631 °C) = 19.6 kJ/mol specific heat solid= 0.209 J/g°C specific heat liquid = 0.259 J/g°C _______kJ are required to melt a 31.3 g sample of solid antimony, Sb, at its normal melting point.
Q4 a) The following information is given for silver at 1atm: boiling point = 2212 °C Hvap(2212 °C) = 254 kJ/mol melting point = 961 °C Hfus(961 °C) = 12.0 kJ/mol specific heat solid= 0.238 J/g°C specific heat liquid = 0.285 J/g°C _______kJ are required to melt a 47.5 g sample of solid silver, Ag, at its normal melting point. b) The following information is given for manganese at 1atm: boiling point = 2095 °C Hvap(2095 °C) = 225 kJ/mol melting point = 1244 °C Hfus(1244 °C) = 14.6 kJ/mol specific heat solid= 0.477 J/g°C specific heat liquid = 0.837 J/g°C What is H in kJ for the process of freezing a 25.5 g sample of liquid manganese at its normal melting point of 1244 °C. _______kJ c) The following information is given for antimony at 1atm: boiling point = 1440 °C Hvap(1440 °C) = 195 kJ/mol melting point = 631 °C Hfus(631 °C) = 19.6 kJ/mol specific heat solid= 0.209 J/g°C specific heat liquid = 0.259 J/g°C _______kJ are required to melt a 31.3 g sample of solid antimony, Sb, at its normal melting point.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Question
Q4
a)
The following information is given for silver at 1atm:
_______kJ are required to melt a 47.5 g sample of solid silver, Ag, at its normal melting point.
| boiling point = 2212 °C | Hvap(2212 °C) = 254 kJ/mol |
| melting point = 961 °C | Hfus(961 °C) = 12.0 kJ/mol |
| specific heat solid= 0.238 J/g°C | |
| specific heat liquid = 0.285 J/g°C |
_______kJ are required to melt a 47.5 g sample of solid silver, Ag, at its normal melting point.
b)
The following information is given for manganese at 1atm:
What is H in kJ for the process of freezing a 25.5 g sample of liquid manganese at its normal melting point of 1244 °C.
_______kJ
| boiling point = 2095 °C | Hvap(2095 °C) = 225 kJ/mol |
| melting point = 1244 °C | Hfus(1244 °C) = 14.6 kJ/mol |
| specific heat solid= 0.477 J/g°C | |
| specific heat liquid = 0.837 J/g°C |
What is H in kJ for the process of freezing a 25.5 g sample of liquid manganese at its normal melting point of 1244 °C.
_______kJ
c)
The following information is given for antimony at 1atm:
_______kJ are required to melt a 31.3 g sample of solid antimony, Sb, at its normal melting point.
| boiling point = 1440 °C | Hvap(1440 °C) = 195 kJ/mol |
| melting point = 631 °C | Hfus(631 °C) = 19.6 kJ/mol |
| specific heat solid= 0.209 J/g°C | |
| specific heat liquid = 0.259 J/g°C |
_______kJ are required to melt a 31.3 g sample of solid antimony, Sb, at its normal melting point.
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