A cylinder of fixed capacity (of 44.8 L) contains 2 mol of helium gas at STP. What is the amount ofheat needed to raise the temperature of the gas in the cylinder by 20°C? (Take, R = 8.31J mol-1K-1)
see full answer
High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET
🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya
a
996 J
b
831 J
c
499 J
d
374 J
answer is C.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Since, the volume of cylinder is fixed and helium is a monoatomic gas.The internal energy = μCVΔT⇒ U=12fμRΔT ∵CV=12fRU=12×3×2×8.31×20 (∵f=3)=498.6≈499J