When two moles of hydrogen atoms join together to form a mole of hydrogen molecules in a rigid v... VIDEO
When two moles of hydrogen atoms join together to form a mole of hydrogen molecules in a rigid vessel
\[
\mathrm{H}(\mathrm{g})+\mathrm{H}(\mathrm{g}) \longrightarrow \mathrm{H}_{2}(\mathrm{~g})
\]
then:
(a) \( \mathrm{w}0 \)
(b) \( \Delta \mathrm{U}= \) negative
-(c) \( \mathrm{q}_{\text {system }}= \) positive
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