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1. Which of the following changes has a decrease in entropy?
N2O4 (g) ______ 2NO2 (g)
C2H5OH (l) + 3 O2 (g) _____ 2CO2 (g) + 3H2O (g)
3O2 (g) + 2KCL) (s) _____ 2 KClO3 (s)
H2O (l) _____ H2O (g)
2. Which of the following processes involves an increase in entropy?
a) condensing water vapor
b) melting gold bars
c) filtering grounds from coffee
d) freezing popsicles
3. Describe in detail what you know about the enthalpy, entropy, and free energy changes when a sample of gas condenses to a liquid. How does temperature affect these changes?
when 0.514 g of biphenyl c12h10 undergoes combustion in a bomb calorimeter the temperature rises from 25.8 degc to 29.4
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
A: 2-methyl-1-bromohexane B: 1-bromohexane which of the above compounds will react the fastest with NaI in acetone?
The enthalpy of vaporization of water is 40.67 kJ/mol, the enthalpy of fusion for water is 6.01 kJ/mol, the molar heat capacity of liquid water is 75.4 J/(mol.C)
a certain anesthetic contains 64.9 percent C, 13.5 percent H, and 21.6 percent O by mass. at 120 grades celcius and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30g. What is the molecular formula of the compound?
For the setup in the above question, what is the value of Q, the reaction quotient, for this cell reaction at 25oC. 2Cr(s) + 3Br2(aq) --> 6Br-(aq) + 2Cr3+(aq)
How many mole of sodium hydroxide is contained in a lye solution in which 130 grams of sodium hydroxide
Explain what is the heat released during reaction. Also what is the enthalpy of neutralization. Does doubling the volumes of acid and base double the amount of heat. Does doubling the concentration of acid base double the amount of heat released
The rate of the reaction of methyl ethyl acetate with hydroxide to form acetate ion and ethanol as shown in the following reaction, CH3COOC2H5(aq) + OH-(aq) => CH3COO-(aq) + C2H5OH(aq) was measured at several temperatures and the following data we..
If this system is studied in a piston/cylinder apparatus at 3000K at P(total) = 1.00 atm, from your K value calculate system composition developing from 1.00 mol H2O (g) and no products initally. Show work no artithmetic.
what is the concentration of a household ammonia cleaning solution if 49.90 ml of .5900M HCL is required to neutralize 25.00 ml of the solution?
The following statements describe some physical and chemical properties of sucrose (table sugar). Which response includes all that describe chemical properties, and none that describe physical properties?
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