Chemistry, asked by Anonymous0402, 10 months ago

why lithium is slower than other elements of group 1 in reacting with water?????

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Answered by aswathi71

Explanation:

The reasons for the slow and non-explosive reaction of Li with water are: ... More activation energy meansslower reactions and less vigorousreactions. The reaction generates heat slowly, and Li has a high melting point, too high for it to melt..

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Answered by Anonymous

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ᴀʟʟ ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ᴏғ ɢʀᴏᴜᴘ 1 ʀᴇᴀᴄᴛ ᴠɪɢᴏʀᴏᴜsʟʏ ᴡɪᴛʜ ᴡᴀᴛᴇʀ ᴛᴏ ɢɪᴠᴇ ᴍᴇᴛᴀʟ ʜʏᴅʀᴏxɪᴅᴇs ᴀɴᴅ ʟɪʙᴇʀᴀᴛᴇ ʜʏᴅʀᴏɢᴇɴ ɢᴀs, ʙᴜᴛ ᴛʜɪs ʀᴇᴀᴄᴛɪᴠɪᴛʏ ɪɴᴄʀᴇᴀsᴇs ᴅᴏᴡɴ ᴛʜᴇ ɢʀᴏᴜᴘ.

ʟɪᴛʜɪᴜᴍ's ᴅᴇɴsɪᴛʏ ɪs ᴏɴʟʏ ᴀʙᴏᴜᴛ ʜᴀʟғ ᴛʜᴀᴛ ᴏғ ᴡᴀᴛᴇʀ, sᴏ ɪᴛ ғʟᴏᴀᴛs ᴏɴ ᴛʜᴇ sᴜʀғᴀᴄᴇ ᴀɴᴅ ᴜʟᴛɪᴍᴀᴛᴇʟʏ ᴅɪsᴀᴘᴘᴇᴀʀs, ɢɪᴠɪɴɢ ᴏғғ ʜʏᴅʀᴏɢᴇɴ ɢᴀs ᴀɴᴅ ғᴏʀᴍɪɴɢ ᴀ ᴄᴏʟᴏᴜʀʟᴇss sᴏʟᴜᴛɪᴏɴ ᴏғ ʟɪᴛʜɪᴜᴍ ʜʏᴅʀᴏxɪᴅᴇ. ʙᴜᴛ ᴜɴʟɪᴋᴇ ᴛʜᴇ ʀᴇsᴛ ᴏғ ᴛʜᴇ s-ʙʟᴏᴄᴋ ᴇʟᴇᴍᴇɴᴛs, ᴛʜɪs ʀᴇᴀᴄᴛɪᴏɴ ɪs ɴᴏᴛ ᴠɪɢᴏʀᴏᴜs.

2ʟɪ(s)+2ʜ2ᴏ(ʟ)→2ʟɪᴏʜ(ᴀǫ)+ʜ2(ɢ)

ᴜsɪɴɢ ʜᴇss’s ʟᴀᴡ, ᴡᴇ ᴄᴀɴ sᴘʟɪᴛ ɪᴛ ɪɴᴛᴏ sᴇᴠᴇʀᴀʟ ᴛʜᴇᴏʀᴇᴛɪᴄᴀʟ sᴛᴇᴘs ᴡɪᴛʜ ᴋɴᴏᴡɴ ᴇɴᴛʜᴀʟᴘʏ ᴄʜᴀɴɢᴇs.

ᴀᴛᴏᴍɪsᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ:

ʟɪ(s)→ʟɪ(ɢ); ∆ʜ=+ᴠᴇ

ɪᴏɴɪsᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ:

ʟɪ(ɢ)→ʟɪ+(ɢ)+ᴇ−; ∆ʜ=+ᴠᴇ

ʜʏᴅʀᴀᴛɪᴏɴ ᴇɴᴛʜᴀʟᴘʏ:

ʟɪ+(ɢ)→ʟɪ+(ᴀǫ); ∆ʜ=-ᴠᴇ

ᴛʜᴇ ʀᴇᴀsᴏɴs ғᴏʀ ᴛʜᴇ sʟᴏᴡ ᴀɴᴅ ɴᴏɴ-ᴇxᴘʟᴏsɪᴠᴇ ʀᴇᴀᴄᴛɪᴏɴ ᴏғ ʟɪ ᴡɪᴛʜ ᴡᴀᴛᴇʀ ᴀʀᴇ:

ᴀs ᴡᴇ ᴍᴏᴠᴇ ᴅᴏᴡɴ ᴛʜᴇ ɢʀᴏᴜᴘ, ᴀs ᴀᴛᴏᴍɪᴄ sɪᴢᴇ ɪɴᴄʀᴇᴀsᴇs, ᴀᴛᴏᴍɪsᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ ᴀɴᴅ ɪᴏɴɪsᴀᴛɪᴏɴ ᴇɴᴛʜᴀʟᴘʏ ᴅᴇᴄʀᴇᴀsᴇ ᴀɴᴅ ᴀs sᴜᴄʜ, ᴛʜᴇɪʀ ᴠᴀʟᴜᴇs ᴀʀᴇ ǫᴜɪᴛᴇ ʜɪɢʜ ғᴏʀ ʟɪ ᴏʀ ᴡᴇ ᴄᴀɴ sᴀʏ ᴛʜᴀᴛ ᴛʜᴇ ᴇɴᴇʀɢʏ ᴛᴏ ʙᴇ sᴜᴘᴘʟɪᴇᴅ ғᴏʀ ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ ᴛᴏ ᴛᴀᴋᴇ ᴘʟᴀᴄᴇ (ᴀᴄᴛɪᴠᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ) ɪs ǫᴜɪᴛᴇ ʜɪɢʜ. ᴇᴠᴇɴ ᴛʜᴏᴜɢʜ, ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ ʜʏᴅʀᴀᴛɪᴏɴ ᴇɴᴛʜᴀʟᴘʏ (-ᴠᴇ) ɪs ᴀʟsᴏ ʜɪɢʜᴇʀ ғᴏʀ ʟɪ ᴛʜᴀɴ ᴏᴛʜᴇʀ ᴇʟᴇᴍᴇɴᴛs ᴏғ ᴛʜᴇ ɢʀᴏᴜᴘ, ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ ʀᴇʟᴇᴀsᴇs ʜᴇᴀᴛ ᴠᴇʀʏ sʟᴏᴡʟʏ, sᴏ ᴀᴄᴛɪᴠᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ ʜᴀs ᴛᴏ ʙᴇ sᴜᴘᴘʟɪᴇᴅ ғɪʀsᴛ ᴀɴᴅ ɪs ᴛʜᴇɴ ʟᴀᴛᴇʀ ʀᴇᴄᴏᴠᴇʀᴇᴅ. ᴍᴏʀᴇ ᴀᴄᴛɪᴠᴀᴛɪᴏɴ ᴇɴᴇʀɢʏ ᴍᴇᴀɴs sʟᴏᴡᴇʀ ʀᴇᴀᴄᴛɪᴏɴs ᴀɴᴅ ʟᴇss ᴠɪɢᴏʀᴏᴜs ʀᴇᴀᴄᴛɪᴏɴs.

ᴛʜᴇ ʀᴇᴀᴄᴛɪᴏɴ ɢᴇɴᴇʀᴀᴛᴇs ʜᴇᴀᴛ sʟᴏᴡʟʏ, ᴀɴᴅ ʟɪ ʜᴀs ᴀ ʜɪɢʜ ᴍᴇʟᴛɪɴɢ ᴘᴏɪɴᴛ, ᴛᴏᴏ ʜɪɢʜ ғᴏʀ ɪᴛ ᴛᴏ ᴍᴇʟᴛ.

ᴀs ғᴀʀ ᴀs ʙᴇɪɴɢ ʟᴇss ʀᴇᴀᴄᴛɪᴠᴇ ᴛʜᴀɴ ᴛʜᴇ ɢʀᴏᴜᴘ 2 ᴇʟᴇᴍᴇɴᴛs ᴏғ ᴛʜᴇ s-ʙʟᴏᴄᴋ ɪs ᴄᴏɴᴄᴇʀɴᴇᴅ, ɪᴛ ғᴏʟʟᴏᴡs ᴛʜᴇ sᴀᴍᴇ ʟᴏɢɪᴄ. ʙᴇ ᴀɴᴅ ᴍɢ ᴡᴏᴜʟᴅ ʜᴀᴠᴇ ʙᴇᴇɴ ᴇxᴄᴇᴘᴛɪᴏɴs ᴀs ʀᴇᴀᴄᴛɪᴠɪᴛʏ ᴡɪᴛʜ ᴡᴀᴛᴇʀ ᴅᴇᴄʀᴇᴀsᴇs ᴀᴄʀᴏss ᴀ ᴘᴇʀɪᴏᴅ ʙᴜᴛ ᴛʜᴇʏ ʜᴀᴠᴇ ᴀ ᴘʀᴏᴛᴇᴄᴛɪᴠᴇ ʟᴀʏᴇʀ ᴏғ ᴏxɪᴅᴇ ᴏɴ ᴛʜᴇɪʀ sᴜʀғᴀᴄᴇs, sᴏ ᴛʜᴇʏ ʀᴇᴀᴄᴛ ᴏɴʟʏ ᴀᴛ ᴠᴇʀʏ ʜɪɢʜ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇs ᴀɴᴅ ᴀʀᴇ ʟᴀʀɢᴇʟʏ ɪɴᴇʀᴛ ᴛᴏᴡᴀʀᴅs ᴡᴀᴛᴇʀ.

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why lithium is slower than other elements of group 1 in reacting with water?????Kindly Answer my Questions​

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why lithium is slower than other elements of group 1 in reacting with water?????

Kindly Answer my Questions