Answer to Question #249801 in Physical Chemistry for mad

Question #249801

When 5.73 g of sodium chloride (NaCl) dissolves in 100 cm³ of water, the temperature of the water fell from 22.4 ^oC to 19.8 ^oC. Calculate the enthalpy change of the reaction.

Expert's answer

∆H = m x s x ∆T

= 5.73× 100×(22.4-19.8)

= 1489.8J/mol

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