Question

Hydrogen gas (H2) and oxygen gas (O2) combine. Which change occurs that indicates a release of bond energy?(1 point)
Responses

a loud popping noise
a loud popping noise

the formation of CO2 bubbles
the formation of CO 2 bubbles

a strong odor
a strong odor

the appearance of color in the gases

Answer 1

None of the given options indicate a release of bond energy.