141. Plots showing the variation of the rate constant (k) with temperature (T) are given below. The plot that follows Arrhenious equation is (1) k (2) T (3) k T (I.I.T. 2010) (4) k Lanomes
Answers
Answer:
ʜᴇᴀʟᴛʜ, ᴛᴏ ᴛʜᴇ ᴡᴏʀʟᴅ ʜᴇᴀʟᴛʜ ᴏʀɢᴀɴɪᴢᴀᴛɪᴏɴ, ɪꜱ "ᴀ ꜱᴛᴀᴛᴇ ᴏꜰ ᴄᴏᴍᴘʟᴇᴛᴇ ᴘʜʏꜱɪᴄᴀʟ, ᴍᴇɴᴛᴀʟ ᴀɴᴅ ꜱᴏᴄɪᴀʟ ᴡᴇʟʟ-ʙᴇɪɴɢ ᴀɴᴅ ɴᴏᴛ ᴍᴇʀᴇʟʏ ᴛʜᴇ ᴀʙꜱᴇɴᴄᴇ ᴏꜰ ᴅɪꜱᴇᴀꜱᴇ ᴀɴᴅ ɪɴꜰɪʀᴍɪᴛʏ." ᴀ ᴠᴀʀɪᴇᴛʏ ᴏꜰ ᴅᴇꜰɪɴɪᴛɪᴏɴꜱ ʜᴀᴠᴇ ʙᴇᴇɴ ᴜꜱᴇᴅ ꜰᴏʀ ᴅɪꜰꜰᴇʀᴇɴᴛ ᴘᴜʀᴘᴏꜱᴇꜱ ᴏᴠᴇʀ ᴛɪᴍᴇ.
Answer:
Correct option is
A
option
Option (A) is correct. K increases exponentially with a rise in T(K=Ae
−E
a
/RT
).
The Arrhenius plot is used to study the effect of temperature on reaction rates. The Arrhenius plot can also be used by extrapolating the line back to the y-intercept to obtain the pre-exponential factor, A.
This factor is significant because A=pZ, where p is a steric factor and Z is the collision frequency. The pre-exponential, or frequency, the factor is related to the number of times molecules will hit in the orientation necessary to cause a reaction.