Half mole of an ideal monoatomic gas is heated at constant pressure of $1\, atm$ from $20\,^oC$ to $90\,^oC$. Work done by has is close to ..... $J$ (Gas constant $R = 8.31\, J/mol.K$)
  • A$581$
  • B$291$
  • C$146$
  • D$73$
JEE MAIN 2019, Easy
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