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When one mole of zinc dust and one mole of sulphuric acid react in a bomb calorimeter, then Δ U and w correspond to

Options

  1. AΔ U > 0 , w = 0
  2. BΔ U < 0 , w = 0
  3. CΔ U = 0 , w = 0
  4. DΔ U < 0 , w > 0

Correct answer

A. Δ 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 = 0 and Δ U = q = - ve (exothermic reaction) . Δ U < 0 , w = 0

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