Multiple Choice
Some "beetles" defend themselves by spraying hot quinone,C6H4O2(l) ,at their enemies.Calculate △rH° for this reaction.
C6H4(OH) 2(l) + H2O2(l) → C6H4O2(l) + 2 H2O(l)
Given: C6H4(OH) 2(l) → C6H4O2(l) + H2(g) +177.4 kJ/mol
The standard enthalpies of formation of H2O2(l) and H2O(l) are -187.4 and -285.8 kJ/mol,respectively.
A) -206.8 kJ/mol
B) -384.2 kJ/mol
C) -561.6 kJ/mol
D) +79.00 kJ/mol
Correct Answer:
Verified
Correct Answer:
Verified
Q33: Given that Δ<sub>f</sub>H° [Ag<sub>2</sub>S(s)] = -32.6 kJ/mole,what
Q34: The complete combustion of propane,C<sub>3</sub>H<sub>8</sub>(g),is represented by
Q35: For a process at constant pressure,49,600 calories
Q36: In the presence of excess oxygen,methane gas
Q37: 100.0 g of Cu (specific heat =
Q39: What is the work in joules done
Q40: Choose the INCORRECT statement.<br>A)The surroundings are the
Q41: Which of the following are thermodynamic state
Q42: Calculate the quantity of heat,in kJ,required to
Q43: A system absorbs 623 J of heat