CHEM 1010 Lecture Notes - Lecture 8: Heat Capacity, Ice Pack, Gold Bar
Document Summary
Exercises i: internal energy, heat and work and first-law of thermodynamics. Heat can only be exchanged with the surroundings through a boundary that allows for heat exchange (i. e. , diathermic walls): work, w, is also energy transfer between the system and surroundings. Explain your answer: now consider the system undergoes a process, let usys represe(cid:374)t the (cid:272)ha(cid:374)ge i(cid:374) syste(cid:373)"s e(cid:374)ergy, uuniv represents the change in energy of the universe. Provide an expression for uuniv in terms of energy change of the system and the surrounding. Explain: let q and w represent two ways to exchange energy between system and surrounding. Steam condenses on skin causing a burn (the condensing steam is the system: consider a closed container that contains some hydrogen gas (h2) and oxygen gas (o2). What is the sign of internal energy change u for this reaction? (d) list the types of energy stored in the system before and after reactions.
