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Get Full Access to Chemistry: A Molecular Approach - 5 Edition - Chapter 19 - Problem 91
Get Full Access to Chemistry: A Molecular Approach - 5 Edition - Chapter 19 - Problem 91

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ISBN: 9780134874371 2047

## Solution for problem 91 Chapter 19

Chemistry: A Molecular Approach | 5th Edition

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Problem 91

Living organisms use energy from the metabolism of food to create an energy-rich molecule called adenosine triphosphate (ATP). The ATP acts as an energy source for a variety of reactions that the living organism must carry out to survive. ATP provides energy through its hydrolysis, which can be symbolized as follows:

$$\mathrm{ATP}(a q)+\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{ADP}(a q)+\mathrm{P}_{\mathrm{i}}(a q) \quad \Delta G_{\mathrm{rxn}}^{\circ}=-30.5 \mathrm{~kJ}$$

where ADP represents adenosine diphosphate and $$P_{i}$$ represents an inorganic phosphate group (such as $$\mathrm{HPO}_{4}^{2-}$$ ).

a. Calculate the equilibrium constant, K, for the given reaction at 298 K.

b. The free energy obtained from the oxidation (reaction with oxygen) of glucose $$\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)$$ to form carbon dioxide and water can be used to re-form ATP by driving the given reaction in reverse. Calculate the standard free energy change for the oxidation of glucose and estimate the maximum number of moles of ATP that can be formed by the oxidation of one mole of glucose.

Text Transcription:

ATP(aq) + H2O(l) longrightarrow ADP(aq) + Pi(aq) ∆G° rxn = -30.5 kJ

P_i

HPO4 2 -

Step-by-Step Solution:
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Grace Russell CH 131 Jennifer Coym Weeks 1-3 Notes Energy: Kinetic and Potential Potential: chemical bonds, the energy contained or released in chemical bonds Kinetic: energy contained in movement Chemistry The study of matter and the changes it undergoes Or The science that seeks to understand the properties and behavior of matter by studying the properties and behavior of atoms and molecules Chemistry is VERY broad 5 types of chemists: Analytical Inorganic Organic Physical Bio Matter  Anything that has mass and takes up space  Atoms are the building blocks of matter  Elements are made up of the same kinds of atom  A compound is made of two or more different kinds of elements  Elements=same kind of atom (hydrogen only, iron only)  Compounds=different elements (water H2O, salt NaCl)  Molecules can differ in complexity (aspirin, water)  Red= oxygen  White=hydrogen  Black=carbon Classification of Matter  Elements a Cannot be decomposed into simpler substances b Each element is composed of only one kind of atom  Compounds a Are composed of two or more elements b Properties are distinct and not related to the properties of the elements they are composed of (NaCl, water)  Pure Substance (substance) a Can be either an element or a compound b Composition does not vary from sample to sample (salt is salt)  Mixture a Combination of different substances (pure substances) b Each substance retains its properties (sand is a mixture)  Homogeneous Mixtures (solutions)

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