Answer to Question #60094 in Physical Chemistry for joseph orobiyi

Question

11 Which of these is true of an isochoric system?
Takes place at constant temperature
Heat is allowed into the system but not allowed out of the system
Volume remains constant
Pressure is not constant



12 The molar heat capacity of Al is 24.4 J/mol/$^{o}C$. How much heat
energy is required to heat 100 g of Al from 20 $^{o}C$ to 80 $^{o}C$?
(Al = 27)
146000 J
30000 J
813000 J
5422 J



13 The first law of thermodynamics deals with
conservation of energy
thermodynamic equivalence
entropy
absolute zero temperature.



14 Which of the following expressions is associated with the law of
conservation of energy?
dG = dH – TdS
q = mCdT
dE = q + w
H = E + PV



15 If a gas absorbs 1000 J of heat and expands by 0.5 $dm^{3}$ against a
constant pressure of 4 atms (1 atm = 100000 Pa), then the change in
internal energy is approximately
-800 J
800 J
1200 J
-1200 J