A student wrote the following equation C6H12O6(s) + 602(g) → 6CO₂(g) + 6H₂O(g) + energy Based on the fact that water vapour is a product, the logical conclusion is that the equation represents: Select one: Ophotosynthesis in an open system cellular respiration in a closed system combustion in a closed system combustion in an open system

A student wrote the following equation C6H12O6(s) + 602(g) → 6CO₂(g) + 6H₂O(g) + energy Based on the fact that water vapour is a product, the logical conclusion is that the equation represents: Select one: Ophotosynthesis in an open system cellular respiration in a closed system combustion in a closed system combustion in an open system

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter15: Energy And Chemical Change

Section: Chapter Questions

Problem 70A

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For which case would ΔHsoln be expected to be negative?(A) if solute-solute interactions are much greater than solvent-solvent and solute-solvent interactions(B) if solute-solvent interactions are much greater than solvent-solvent and solute-solute interactions(C) if solute-solvent interactions are the same as solvent-solvent and solute-solute interactions(D) if solvent-solvent interactions are much greater than solute-solvent and solute-solute interactions
Which of the following expressions is true for the chemical system presented in the equation: 2SO2 + O2 = 2SO3 deltaH
1. Which, if any of the following, constitute a closed system?(a) A sealed container in which a chemical reaction occurs.(b) A dog.(c) An open beaker in the lab, in which a reaction occurs.(d) A mixture of gases inside a sealed impenetrable balloon. 2. What is the definition of an isolated system? How could you approximate anisolated system in the lab?
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using a calibrated solution calorimeter measured a temperature decrease of 1.10 K when 1.00 g of KNO3 was added to 74.40 g of deionized water in the calorimeter. The specific heat capacity of the solution calorimeter was found to be 4.15 J/gK. Calculate the experimental value of the molar heat of solution of KNO3, ΔHsoln. Was the dissolution of this salt exothermic or endothermic?
When ethyl acetate in dilute aqueous solution is heated in the presence of a small amount of acid, it decomposes to acetic acid and ethanol according to the equation CH;COOC;Hs + H;0 -> CH3COOH + C2HSOH Since the reaction takes place in dilute solution, the quantity of water present is so great that the loss of the small amount which combines with ethyl acetate produces no appreciable change in the total amount. Hence, of the reacting substances, only ethyl acetate suffers a measurable change in concentration. A chemical reaction of this sort, in which the concentration of only one reaction substance changes, is called a first-order reaction. It is a law of physical chemistry that the rate at which a substance is being used up in a first order reaction is proportional to the amount of that substance instantaneously present. If the initial concentration of ethyl acetate is Co, find the expression for its concentration at any time t.
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