Multiple Choice
Calculate the heat released (kJ) in the reaction of 3.50 g of acetylene (C2H2) and excess hydrogen gas to form ethane gas: C2H2(g) + 2H2(g) C2H6(g)
Given:
2C2H2(g) + 5O2(g) 4CO2(g) + 2H2O(g) H = -2320 kJ/mol
2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(g) H = -3040 kJ/mol
2H2(g) + O2(g) 2H2O(g) H = -572 kJ/mol
A) 27.5 kJ
B) 28.5 kJ
C) 29.5 kJ
D) 30.5 kJ
E) None of the above
Correct Answer:

Verified
Correct Answer:
Verified
Q94: A gas is compressed in a cylinder
Q95: A 135 g sample of H<sub>2</sub>O
Q96: When an automobile engine starts, the
Q97: At 25<sup> <span class="ql-formula" data-value="\circ"><span class="katex"><span
Q98: The heat of solution of KCl is
Q100: Chemical energy is<br>A) the energy stored within
Q101: The specific heat of silver is
Q102: Calculate the standard enthalpy change for
Q103: Find <span class="ql-formula" data-value="\Delta"><span class="katex"><span
Q104: The enthalpy of combustion of acetylene