Learning Outcomes for UNIT 4

Each student should have a good grasp of the following learning outcomes for unit 4. Unit 4 is assessed on Exam 4 which is on Tuesday 11/29/11 from 7-9 PM. Read the bulleted points and self assess yourself on how well you know the topic.

Students will be able to...

• Understand the concept of the energy units, calorie, kilocalorie and kilojoule.
• Understand the concept of internal energy, heat, work.
• State and use the equation for change in internal energy, \(\Delta U\).
• Understand all sign conventions in for all the thermodynamic concepts.
• Calculate \(q\) for various processes.
• Calculate \(w\) for expansion or compression against constant pressure.
• Understand the concept of heat capacity, specific heat capacity and molar heat capacity.
• Explain the difference between coffee cup calorimeter and bomb type calorimeter.
• Understand the concept of change in enthalpy.
• Calculate change in enthalpy,\(\Delta H\), and change in internal energy,\(\Delta U\), based on raw calorimeter data.
• Write a formation chemical equation for a compound.
• Calculate change in enthalpy based on tabulated data (Hess’s law, formation data, bond energy data).
• Calculate change in enthalpy for physical change: both change in temperature and phase change.
• Understand the concept of entropy, \(S\), and change in entropy, \(\Delta S\).
• Calculate change in entropy of system for physical change at constant temperature and with change in temperature and for chemical change using tabulated standard molar entropy data.
• Calculate change in entropy for the surroundings for a physical change and a chemical change.
• Understand the concept of change in entropy of system, surroundings, and universe.
• Be able to state the three laws of thermodynamics.
• Understand the concept of the change in free energy, \(\Delta G\).
• Be able to calculate change in free energy for a chemical change from change in enthalpy and change in entropy values.
• Recognize, based on the sign and magnitude of change in enthalpy and change in entropy, how changing the temperature affects the spontaneity of a physical or chemical change.
• Calculate the temperature at which a particular change (physical or chemical) will be spontaneous.