Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
The correct order of melting points of isomeric pentanes is
n-Pentane > iso-Pentane > neo - Pentane
neo-Pentane > n-Pentane > iso-Pentane
neo-Pentane > iso-Pentane > n-Pentane
n-Pentane > neo-Pentane > iso-Pentane
Explain the ansss plzzz.....
hey geoff,
the answer to your question is option B
with incresing order of melting points...
as :
isomers Melting point(Co)
n-pentane −129.8
isopentane −159.9
neopentane −16.6
Hey thank you for the ans but can u say how to predict it ....???
Correct answer is (A)., bcoz, chain with no branch has more vanderwaal attractions. This declines with inc. in branching!!!!!!!
Good Luck!!!!!!!
Plz. approve!!!! Plz!!!!!!!!
yeah geoff,
if you consider the Rotation about two central single C-C bonds of n-pentane produces four different conformations.
Even, the melting point of neopentane, the most heavily branched of the three, is 100 °C higher that of isopentane. The anomalously high melting point of neopentane has been attributed to the better solid-state packing assumed to be possible with its tetrahedral molecule; but this explanation has been challenged on account of it having a lower density than the other two isomers. The branched isomers are more stable (have lower heat of formation and heat of combustion) than normal pentane.
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !