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When 1. 00 mole of nh4no3 dissolves in water, the enthalpy change is δh = + 25. 7 kj. What is the enthalpy change if 17. 5 grams of nh4no3 are dissolved in water?

Respuesta :

Eduard22sly

The enthalpy change involved in the dissolution of 17. 5 grams of NH₄NO₃ in water is +5.47 KJ

Data obtained from the question

  • 1 mole of NH₄NO₃ has an enthalpy change of +25 KJ
  • 17.5 g of NH₄NO₃ =?

How to determine the enthalpy change for 17. 5 g of NH₄NO₃

1 mole of NH₄NO₃ = 14 + (1×4) + 14 + (3×16) = 80 g

Thus, we can say that:

80 g of NH₄NO₃ has an enthalpy change of +25 KJ

Therefore,

17.5 g of NH₄NO₃ will have an enthalpy change of = (17.5 × 25) / 80 = +5.47 KJ

Thus, the enthalpy change for 17.5 g of NH₄NO₃ is +5.47 KJ

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