1) A piece of bread is inserted into a toaster andbegins to toast. Identify the correct statement. |
a The internal energy of the toaster decreasesas the internal energy of the bread increases
b Heat enters the bread and the internal energyof the toaster decreases
c Work is done to the bread and the internalenergy of the toaster decreases
d Work is done to the bread and heat enters thebread
2) If a system is doing work on its surroundings, andgaining heat from its surroundings, then which of the followingshows the correct signs for heat and work representing thesystem? |
a q=–,w=+
b q=+,w=–
c q=+,w=+
d q=–,w=–
3. What is the difference between heatcapacity (CV) and specific heat capacity(c)?
a CV refers to isochoricconditions, whereas c does not refer to isochoric conditions
b c considers the whole system, whereasCV considers only a unit mass of the system
c CV considers the wholesystem, whereas c considers only a unit mass of the system
