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AIIMS 2005
Exam
AIIMS
Year
2005
Subject
Chemistry
Chapter
Thermodynamics (C)

AIIMS 2005 · Chemistry · Thermodynamics (C)

For the reaction of one mole of zinc dust with one mole of...

For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ΔU\Delta U and ww corresponds to

Options

  1. AΔU<0,w=0\Delta U < 0, w=0
  2. BΔU<0,w<0\Delta U < 0, w < 0
  3. CΔU>0,w=0\Delta U>0, w=0
  4. DΔU>0,w>0\Delta U>0, w>0.

Correct answer

A. ΔU<0,w=0\Delta U < 0, w=0

Step-by-step solution

Bomb calorimeter is commonly used to find the heat of combustion of organic substances which consists of a sealed combustion chamber, called a bomb. If a process is run in a sealed container then no expansion or compression is allowed, so w=0w=0 and ΔU=q\Delta U=q. \Delta U < 0, w=0 .
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