Which one of the equations below is an exothermic reaction? A) CO2 (g) - C(s) + O2 (g) AH = 394 kJ/mol
B) CaO (s) + H2O (D = Ca(OH)2 (aq) AH = -64
kJ/mol
C) C (s) + 2 F2 (g) - CF. (9) AH = 141.3
kJ/mol
2 NO (9) AH° = 180.6
D) N2 (g) + O2 (9)
kJ/mol

B) CaO(s) + H2O(l) --> Ca(OH)2(aq)

Explanation:

This is the only reaction with a negative enthalpy value. Exothermic reactions have a negative enthalpy.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

i believe the answer is 5,000