For the reaction 2H_{(g)} to H_{2_{(g)}},the | vedclass

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(A) $1$. In the reaction $2H_{(g)} 	o H_{2_{(g)}}$,a chemical bond is formed between two hydrogen atoms to produce a hydrogen molecule. Bond formatio

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(A) $1$. In the reaction $2H_{(g)} 	o H_{2_{(g)}}$,a chemical bond is formed between two hydrogen atoms to produce a hydrogen molecule. Bond formation is an exothermic process,so the enthalpy change $\Delta H$ is negative $(-)$.$2$. In the reaction,two moles of gaseous atoms are converted into one mole of gaseous molecules. This results in a decrease in the number of moles of gas,which leads to a decrease in the randomness or disorder of the system. Therefore,the entropy change $\Delta S$ is negative $(-)$.$3$. Thus,both $\Delta H$ and $\Delta S$ are negative.

For the reaction $2H_{(g)} \to H_{2_{(g)}}$,the signs of $\Delta H$ and $\Delta S$ are:

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