Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas: Al (s) + 3 HCI (1) → AICI3 (aq) + H2 (g) When 2.683 g of Al is combined with enough hydrochloric acid to make 200.0 mL of solution in a coffee-cup calorimeter, all af the Al reacts, raising the temperature of the solution from 25 °C to 29.2 °C. Find the AHrxn in kJ for the reaction as written. (Assume that the specific heat capacity of the solution is 4.184 J/g °C and the density is 1.00 g/mL.)

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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**Reaction of Aluminum with Hydrochloric Acid**

Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas:

\[ \text{Al (s) + 3 HCl (l) } \rightarrow \text{ AlCl}_3 \text{ (aq) + H}_2 \text{ (g)} \]

When 2.683 g of Al is combined with enough hydrochloric acid to make 200.0 mL of solution in a coffee-cup calorimeter, all of the Al reacts, raising the temperature of the solution from 25 °C to 29.2 °C. Find the \(\Delta H_{\text{rxn}}\) in kJ for the reaction as written. (Assume that the specific heat capacity of the solution is 4.184 J/g °C and the density is 1.00 g/mL.)

**Your Answer:**

\[ \boxed{\phantom{Answer}} \]

\[ \boxed{\phantom{units}} \]

In this setup, students are tasked with calculating the enthalpy change (\(\Delta H_{\text{rxn}}\)) of a reaction involving aluminum and hydrochloric acid, using calorimetric data. The specific heat capacity and density of the solution are provided to aid in the calculation.
Transcribed Image Text:**Reaction of Aluminum with Hydrochloric Acid** Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas: \[ \text{Al (s) + 3 HCl (l) } \rightarrow \text{ AlCl}_3 \text{ (aq) + H}_2 \text{ (g)} \] When 2.683 g of Al is combined with enough hydrochloric acid to make 200.0 mL of solution in a coffee-cup calorimeter, all of the Al reacts, raising the temperature of the solution from 25 °C to 29.2 °C. Find the \(\Delta H_{\text{rxn}}\) in kJ for the reaction as written. (Assume that the specific heat capacity of the solution is 4.184 J/g °C and the density is 1.00 g/mL.) **Your Answer:** \[ \boxed{\phantom{Answer}} \] \[ \boxed{\phantom{units}} \] In this setup, students are tasked with calculating the enthalpy change (\(\Delta H_{\text{rxn}}\)) of a reaction involving aluminum and hydrochloric acid, using calorimetric data. The specific heat capacity and density of the solution are provided to aid in the calculation.
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