Explain the enthalpy change for a reaction is negative

Assignment Help Chemistry
Reference no: EM13698028

Question- 1) Criticize the following statement: when the enthalpy change for a reaction is negative and the entropy change is also negative the reaction is spontaneous.

2) For each of the following processes, give the algebraic sign (+ or -) of ?H°, ?S°, and ?G°. No calculations are necessary. Give a brief reason for your choices.

a) The splitting of liquid water into hydrogen and oxygen gases, a process that requires a considerable amount of energy to sustain.

b) The combustion of gasoline in the engine of your car, as exemplified by the combustion of octane.

2 C8H18 (g) + 25 O2 (g) ? 16 CO2 (g) + 18 H2O(g)

Explain the each and every step in detail for help

Reference no: EM13698028

Questions Cloud

Explain what angular frequency will the inductive reactance : Question- An LRC series circuit consists of an 85.0-? Resistor, a 14.0-F capacitor, a 1.50-mH inductor, and a variable frequency ac source of voltage amplitude 13.25 V. At what angular frequency will the inductive reactance be 4.00 times as large a..
Explain the reactivity of the n/n-dimethylaniline reagent : Question- In the experiment, a point is made that the formation of the azo compound is a slow reaction but the rate is increased by raising the pH of the solution. Why is this necessary? In other words, how does the pH of the solution affect the r..
Hydrogen has at stp completely reacts with oxygen : Question- How many grams of water can be formed when 1.396L of Hydrogen has at STP completely reacts with Oxygen
Calculate the solubility of pbf2 : Calculate the solubility of- PbF2 for which the Ksp = 3.3 x 10-8. What is the solubility of PbF2 in 0.025 M NaF solution
Explain the enthalpy change for a reaction is negative : Question- 1) Criticize the following statement: when the enthalpy change for a reaction is negative and the entropy change is also negative the reaction is spontaneous.
Styrene with sulfuric acid in water to go to completion : Question- How long did it take for the reaction of styrene with sulfuric acid in water to go to completion. All of the starting material was gone
What role did sulfuric acid play in this reaction : Question- If the product produce when styrene is reacted with sulfuric acid in the presence is 1-phenylethanol. What role did sulfuric acid play in this reaction
Explain 10 water molecules to break down an oligosaccharide : Question- Why does it take 10 water molecules to break down an oligosaccharide that contains 10 glucose units
What is the molecular weight of the unknown material : Question- In an experiment, 3.545 grams of an unknown non-electrolyte in 15.0 grams of water. The extrapolated freezing point is -0.56 degrees C. What is the molecular weight of the unknown material

Reviews

Write a Review

Chemistry Questions & Answers

  How much of solution must mix to load the gel correctly

You need to load 10 ug of protein into one of the wells of a gel. This needs to be in 1x buffer and in a total volume of 15 uL. You are given a 10 ug/uL solution of protein, a 5x buffer, and water. How much of each should you mix to load the gel c..

  Evaluate the standard emf of a cell

Calculate the standard emf of a cell that uses Mg/Mg2+ and Cu/Cu2+ half-cell reactions at 25°C.

  Explain the catalytic efficiency of the enzyme under

If the Km of carbonic anhydrase for the above reaction is 1.8 mM, what is the catalytic efficiency of this enzyme under these conditions? The units are s-1M-1.

  Evaluate the molarity of the hcl solution

If A 34 mL sample of HCl was triated with .58 M NaOH. Three drops of phenolphthalein was added to the HCL solution. Suppose the HCl solution changed color after 72mL of NaOH was added. Evaluate the molarity of the HCl Solution.

  Hygrogen chloride in the hydrochloric acid solution

Problem- in both reaction #a and reaction #b, the dissolved hygrogen chloride in the hydrochloric acid solution is part of the system. Why is this

  How many moles of oxygen are produced

Two moles of potassium chloride and three moles of oxygen are produced from the decomposition of two moles of potassium chlorate, KClO3(s). Write the balanced equation. How many moles of oxygen are produced from 12 moles of potassium chlorate?

  You react e-27-dimethyl-4-octene with bromine collect

1 you react e-27-dimethyl-4-octene with bromine collect product and then perform a second reaction with potassium

  Compute the acidity constant

Using the concentration of CH3COOH (0.8326M) and the equilibrium concentration of H3O+ (OJ = 31.6x10^-6 and milk = 3.16x10^-8), complete the reaction table for vinegar. Then calculate the acidity constant. Please show all work in solving the probl..

  What concentration of sodium propanoate should be added

Propanoic acid has a Ka of 1.4 x 10^5. If we make a solution 0.100 M in propanoic acid, what concentration of sodium propanoate should be added to give a buffer with a pH of 5.0?

  State white powder is indeed caffeine and not catechin

He decides to run an FTIR on the resultant powder on the cold finger apparatus. WHat functional group would clearly cofiirm that the white powder is indeed caffeine and not catechin?

  Evaluate the temperature of the system once equilibrium

A mass of 47.5 g of H2O(s) at 272 K is dropped into 225g of H2O(l) at 298 K in an insulated container at 1 bar of pressure. Calculate the temperature of the system once equilibrium has been reached.

  Define what is the value of the rate constant

What is the value of the rate constant for the reaction? How much time will take the consentration to drop to one tenth of its initial value?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd