31. Heat of neutralization involves:
A) Acid + Base
B) Salt + Water
C) Gas + Gas
D) Solid + Solid
Answer: A
32. Standard enthalpy change is measured at:
A) 1 atm, 25°C
B) 2 atm
C) 100°C
D) 0 atm
Answer: A
33. Exothermic reactions feel:
A) Cold
B) Hot
C) Neutral
D) Dry
Answer: B
34. Endothermic reactions feel:
A) Hot
B) Cold
C) Neutral
D) Dry
Answer: B
35. Heat of combustion is:
A) Heat released during burning
B) Heat absorbed
C) Heat at freezing
D) Heat at melting
Answer: A
36. System refers to:
A) Surroundings
B) Part under study
C) Whole universe
D) Only container
Answer: B
37. Surroundings are:
A) System
B) Everything else
C) Reaction
D) Only gas
Answer: B
38. Closed system exchanges:
A) Matter only
B) Energy only
C) Both
D) None
Answer: B
39. Open system exchanges:
A) Matter only
B) Energy only
C) Both
D) None
Answer: C
40. Isolated system exchanges:
A) Matter
B) Energy
C) Both
D) None
Answer: D