Question

Energy is stored in the body in adenosine triphosphate, ATP, which is formed by the reaction between adenosine diphosphate, ADP, and dihydrogen phosphate ions. $\mathrm{ADP}^{3-}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{PO}_{4}^{2-}(\mathrm{aq}) \longrightarrow \mathrm{ATP}^{i-}(\mathrm{aq})+\mathrm{H}_{2} 0(\ell)$ $\Delta H^{\circ}=38 \mathrm{~kJ}$ Is the reaction endothermic or exothermic?

Name: Problem 55, Chapter 6: Chemistry: The Molecular Science
Uploaded: 2021-10-31T00:42:19-08:00
Duration: 2 min 36 s
Channel: Aadit Sharma
Description: Energy is stored in the body in adenosine triphosphate, ATP, which is formed by the reaction between adenosine diphosphate, ADP, and dihydrogen phosphate ions. ADP^3-(aq)+H2 PO4^2-(aq) ⟶ATP^i-(aq)+H2 0(ℓ) ΔH^∘=38 kJ Is the reaction endothermic or exothermic?

   Energy is stored in the body in adenosine triphosphate, ATP, which is formed by the reaction between adenosine diphosphate, ADP, and dihydrogen phosphate ions.
$\mathrm{ADP}^{3-}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{PO}_{4}^{2-}(\mathrm{aq}) \longrightarrow \mathrm{ATP}^{i-}(\mathrm{aq})+\mathrm{H}_{2} 0(\ell)$
$\Delta H^{\circ}=38 \mathrm{~kJ}$
Is the reaction endothermic or exothermic?

Chemistry: The Molecular Science

John W. Moore,… 3rd Edition

Chapter 6, Problem 55

Instant Answer

Solved by Expert Aadit Sharma

10/31/2021

Step 1

Step 1: The given reaction is $\mathrm{ADP}^{3-}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{PO}_{4}^{2-}(\mathrm{aq}) \longrightarrow \mathrm{ATP}^{4-}(\mathrm{aq})+\mathrm{H}_{2} 0(\ell)$ with $\Delta H^{\circ}=38 \mathrm{~kJ}$. Show more…

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Energy is stored in the body in adenosine triphosphate, ATP, which is formed by the reaction between adenosine diphosphate, ADP, and dihydrogen phosphate ions. $\mathrm{ADP}^{3-}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{PO}_{4}^{2-}(\mathrm{aq}) \longrightarrow \mathrm{ATP}^{i-}(\mathrm{aq})+\mathrm{H}_{2} 0(\ell)$ $\Delta H^{\circ}=38 \mathrm{~kJ}$ Is the reaction endothermic or exothermic?

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Key Concepts

Enthalpy Change (?H)

Enthalpy change represents the heat absorbed or released during a reaction. A positive ?H value indicates that the reaction absorbs energy from its surroundings, while a negative value indicates that energy is released.

Endothermic Reaction

An endothermic reaction is one in which energy is absorbed from the surroundings, typically indicated by a positive ?H value. In such reactions, energy is taken in to form the products, resulting in a net absorption of heat.

ATP Synthesis

ATP synthesis is a biological process where adenosine diphosphate (ADP) combines with a phosphate group to form adenosine triphosphate (ATP). This process requires an input of energy, making it an endothermic reaction, as evidenced by the positive enthalpy change.

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