Question

Hydrogen gas (H2) and oxygen gas (O2) combine. Which change occurs that indicates a release of bond energy?(1 point)Responsesthe formation of CO2 bubblesthe formation of CO 2 bubblesa loud popping noisea loud popping noisea strong odora strong odorthe appearance of color in the gases

Answer 1

The presence of a loud popping noise indicates a release of bond energy when hydrogen gas (H₂) combines with oxygen gas (O₂). This reaction is exothermic and typically occurs when hydrogen combusts in air, producing water vapor and releasing energy in the form of sound and heat.