5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200 K. If CV = 28 J K |
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(a) |
U = 14 kJ; (pV) = 18 kJ |
(b) |
U = 2.8 kJ; (pV) = 0.8 kJ |

(c) |
U = 14 J; (pV) = 0.8 kJ |
(d) |
U = 14 kJ; (pV) = 4 kJ |

5 moles of an ideal gas at 100 K are allowed to undergo reversible compression till its temperature becomes 200 K. If CV = 28 J K |
|||

(a) |
U = 14 kJ; (pV) = 18 kJ |
(b) |
U = 2.8 kJ; (pV) = 0.8 kJ |

(c) |
U = 14 J; (pV) = 0.8 kJ |
(d) |
U = 14 kJ; (pV) = 4 kJ |

1 Answer

127 votes

ΔU = n c_{vm} ΔT=5 28 100

=14kJ

(PV)=nR(T_{2}−T_{1})

= 5 × 8 × 100

= 4 kJ

127 votes

127