Houston Community College

CHEM 1311

Objects can possess energy as __B & C__.
(a) endothermic energy
(b) potental energy
(c) kinetc energy
The internal energy of a system is always increased by ________.
Which one of the following conditons would always result in an increase in the internal energy of a
system?
A) The system loses heat and does work on the surroundings.
B) The system gains heat and does work on the surroundings.
C) The system loses heat and has work done on it by the surroundings.
D) The system gains heat and has work done on it by the surroundings
Which one of the following is an exothermic process?
A) ice meltng
B) water evaporatng
C) boiling soup
D) condensaton of water vapor
E) Ammonium thiocyanate and barium hydroxide are mixed at 25 °C: the temperature drops.
Which of the following is a statement of the frst law of thermodynamics?
A) Ek= mv2
B) A negatve ΔH corresponds to an exothermic process.
C) ΔE = Efnal- Inital