Answer part A,B,C, and D: A) Define thermal energy. A) energy associated with th
ID: 926494 • Letter: A
Question
Answer part A,B,C, and D:
A) Define thermal energy.
A) energy associated with the temperature of an object
B) energy associated with the motion of an object
C) energy associated with the force of an object
D) energy associated with the gravity of an object
E) energy associated with the position or composition of an object
B) Which should give the least vigorous reaction when dropped in water?
A) Li
B) Na
C) K
D) Rb
E) Cs
C) Which should give the most vigorous reaction when dropped in water?
A) C
B) K
C) Zn
D) Ca
E) Si
D) Strontium phosphate reacts with sulfuric acid to form strontium sulfate and phosphoric acid. What is the coefficient for sulfuric acid when the equation is balanced using the lowest, whole-numbered coefficients?
A) 1
B) 2
C) 3
D) none of these
Explanation / Answer
The word thermal implies heat or temperature. Therefore thermal energy is
A) energy associated with the temperature of an object
Which should give the least vigorous reaction when dropped in water?
All the metals in the options are Group 1 metals. Group 1 metals become more reactive towards water as we go down the group. Lithium tops the group, hence its the least reactive.
A) Li
Which should give the most vigorous reaction when dropped in water?
B) Patassium (K) should give the most vigorous reaction when dropped in water
The balance reaction between Strontium phosphate and sulfuric acid is as follows,
Sr3(PO4)2 + 3H2SO4 ----> 3SrSO4 + 2H3PO4
We can see that the coefficient for H2SO4 (sulfuric acid) is 3
C) 3