Thermochemistry and The First Law of Thermodynamics · PDF fileCHEM 14B Instructor: Dr....
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CHEM 14B Instructor: Dr. Laurence Lavelle WINTER 2018 Thermochemistry and The First Law of Thermodynamics Read: Ch 8 including Box 8.2 (Omit: 8.18, 8.20) Do Problems: 1, 3, 5, 7, 9, 11, 13, 15, 19, 21, 23, 25, 27, 29, 31, 37, 39, 41, 43, 45, 47, 49, 51, 53, 57, 59, 61, 63, 65, 67, 73, 75, 77, 85, 87, 91, 93, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117 After going through the readings & problems and attending the lectures & discussion groups, you should be able to: • Identify a phase change and calculate its change in enthalpy. • Identify exothermic and endothermic reactions by the direction of heat flow and by the sign of ∆H. • Define enthalpy and explain how Hess's law depends on the fact that enthalpy is a state property. • Calculate an overall reaction enthalpy from the enthalpies of the reactions in a reaction sequence. • Define the standard state of a substance and recognize when a substance is in its standard state. • Use standard enthalpies of formation to calculate the standard enthalpy of a reaction. • Explain the meanings of heat capacity and specific heat capacity. • Determine the heat output of a reaction, given the temperature change of a calorimeter. • Calculate enthalpy changes from calorimetric data. • Distinguish between a system and its surroundings. • Distinguish the three different types of thermodynamic systems. • Distinguish heat (q) and work (w). • Calculate the work of expansion at constant pressure, w = - V1∫ V2 PEX dV = - PEX ∆V • Calculate the change in internal energy (∆U) due to heat and work. • State and explain the first law of thermodynamics (∆U = q + w). • Distinguish ∆U and ∆H and show how they are related. When q = qP then ∆U = ∆H - P∆V. • Understand the environmental impact of burning fossil fuels, and the use of alternative fuels.
Transcript of Thermochemistry and The First Law of Thermodynamics · PDF fileCHEM 14B Instructor: Dr....
CHEM 14B Instructor: Dr. Laurence Lavelle WINTER 2018
Thermochemistry and The First Law of Thermodynamics
Read: Ch 8 including Box 8.2 (Omit: 8.18, 8.20) Do Problems: 1, 3, 5, 7, 9, 11, 13, 15, 19, 21, 23, 25, 27, 29, 31, 37, 39, 41, 43, 45, 47, 49, 51, 53, 57, 59, 61, 63, 65, 67, 73, 75, 77, 85, 87, 91, 93, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117 After going through the readings & problems and attending the lectures & discussion groups, you should be able to: • Identify a phase change and calculate its change in enthalpy.
• Identify exothermic and endothermic reactions by the direction of heat flow and by the
sign of ∆H.
• Define enthalpy and explain how Hess's law depends on the fact that enthalpy is a state
property.
• Calculate an overall reaction enthalpy from the enthalpies of the reactions in a reaction
sequence.
• Define the standard state of a substance and recognize when a substance is in its
standard state.
• Use standard enthalpies of formation to calculate the standard enthalpy of a reaction.
• Explain the meanings of heat capacity and specific heat capacity.
• Determine the heat output of a reaction, given the temperature change of a calorimeter.
• Calculate enthalpy changes from calorimetric data.
• Distinguish between a system and its surroundings.
• Distinguish the three different types of thermodynamic systems.
• Distinguish heat (q) and work (w).
• Calculate the work of expansion at constant pressure, w = - V1∫V2 PEX dV = - PEX ∆V
• Calculate the change in internal energy (∆U) due to heat and work.
• State and explain the first law of thermodynamics (∆U = q + w).
• Distinguish ∆U and ∆H and show how they are related. When q = qP then ∆U = ∆H - P∆V.
• Understand the environmental impact of burning fossil fuels, and the use of alternative fuels.
