Chemistry, 14.11.2019 05:31 impura12713
Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. when the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: nh4no3(s)→nh4+(aq)+no3−(aq) in order to measure the enthalpy change for this reaction, 1.25 g of nh4no3 is dissolved in enough water to make 25.0 ml of solution. the initial temperature is 25.8 ∘c and the final temperature (after the solid dissolves) is 21.9 ∘c. part a calculate the change in enthalpy for the reaction in kilojoules per mole. (use 1.0g/ml as the density of the solution and 4.18j/g⋅∘c as the specific heat capacity.)
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Chemistry, 22.06.2019 22:30
What is the value of the standard enthalpy of formation of an element in its most stable form?
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Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and w...
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