Values for ΔH° and ΔS° for a reaction can be determined experimentally by fitting a linear...
Values for ΔH° and ΔS° for a reaction can be determined experimentally by fitting a linear equation to a plot of ________ on the x-axis and ________ on the y-axis. The slope of this equation is equal to ________ and the intercept allows us to calculate ________.
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Values for ΔH° and ΔS° for a reaction can be
determined experimentally by fitting a linear...
Borax, sodium tetraboratedecahydrate, is an important mineral found in dry lakebeds in California. It is used to make so...
Borax, sodium tetraboratedecahydrate, is an important mineral found in dry lakebeds in California. It is used to make soap and glass and used as a preservative. You can use the values of Ksp (solubility-product constant) of borax at different temperatures to determine ΔH∘, ΔS∘, and ΔG∘ for the dissolution of borax: Na2B4O5(OH)4⋅8H2O(s)(borax)→2Na+(aq)+B4O5(OH)42−(aq)(tetraborate)+8H2O(l) The relationship ln(Ksp)=−ΔH∘RT+ΔS∘R has the form of a linear equation, y=mx+b, where y is lnKsp and x is 1/T. The slope (m) is equal to −ΔH∘/R, and the...
A certain reaction has positive values for both ΔH and ΔS. Therefore, the reaction a. can be spontaneous if...
A certain reaction has positive values for both ΔH and ΔS. Therefore, the reaction a. can be spontaneous if the temperature is low enough. b. Cannot be spontaneous at any temperature. c. must be spontaneous at all temperatures. d. can be spontaneous if the temperature is high enough. e. has a positive free energy at any temperature.
Use one of your experimentally determined values of k, the activation energy you determined, and the...
Use one of your experimentally determined values of k, the activation energy you determined, and the Arrhenius equation to calculate the value of the rate constant at 25 °C. Alternatively, you can simply extrapolate the straight line plot of ln(k) vs. 1/T in your notebook to 1/298 , read off the value of ln(k), and determine the value of k. Please put your answer in scientific notation. slope=-12070, Ea=100kJ/mol, k= 0.000717(45C), 0.00284(55C), 0.00492(65C), 0.0165(75C), 0.0396(85C)
Use one of your experimentally determined values of k, the activation energy you determined, and the Arrhenius equation...
Use one of your experimentally determined values of k, the activation energy you determined, and the Arrhenius equation to calculate the value of the rate constant at 25 °C. Alternatively, you can simply extrapolate the straight line plot of ln(k) vs. 1/T in your notebook to 1/298 , read off the value of ln(k), and determine the value of k. Please put your answer in scientific notation. slope=-12070, Ea=100kJ/mol, k= 0.000717(45C), 0.00284(55C), 0.00492(65C), 0.0165(75C), 0.0396(85C)
For a particular reaction, ΔH° is -28.4 kJ and ΔS is -87.9 J/K. Assuming these values...
For a particular reaction, ΔH° is -28.4 kJ and ΔS is -87.9 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?
For the values give for ΔH and ΔS, calculate ΔG foreach for each of the following reactions at 298 K. If the reactionis...
For the values give for ΔH and ΔS, calculate ΔG foreach for each of the following reactions at 298 K. If the reactionis not spontaneous under standard conditions at 298 K, at whattemperature (if any) would the reaction become spontaneous? a) 2PbS(s)+3O2(g) ---> 2PbO(s)+2SO2(g) ΔH= -844kj ; ΔS = -165 J/K b)2POCl3(g)--->2PCl3(g)+O2(g) ΔH= 572kJ ; ΔS= 179 J/K
Computer output for fitting a simple linear model is given below.State the value of the sample...
Computer output for fitting a simple linear model is given below.State the value of the sample slope for this model and give the null and alternative hypotheses for testing if the slope in the population is different from zero. Identify the p-value and use it (and a 5% significance level) to make a clear conclusion about the effectiveness of the model. The regression equation is Y - 78.8 -0.014. Predictor Coef SE Coef T P Constant 78.79 11.30 6.97 0.000...
#2 between two quantities can be established. Procedure: Use the following sets of data and work...
#2
between two quantities can be established. Procedure: Use the following sets of data and work with each one. The equation for a linear graph is y mx+b, where m is the slope and b is the y-intercept DATA SET 1: Fahrenheit-vs-Celsius Fahrenheit Celsius 32 68 104 140 176 0 20 40 60 80 1. Using Data Set 1 above, graph Fahrenheit (y)-vs- Celsius (x), using the scatterplot function in excel, or another graphing software. Make sure you label the...
A) Assume a linear relationship between the variables Y and X , and that Y is...
A) Assume a linear relationship between the variables Y and X , and that Y is the variable measured on the vertical axis while X is the variable measured on the horizontal axis. A straight line describing this relationship has a y-axis intercept of 10 and a slope of -1.25. What is the equation for this line? B) Is the relationship between Y and X positive or negative? How can you tell just by looking at this equation? C) Use...
Experimentally, which of the following data will give plots that allow us to determine values of...
Experimentally, which of the following data will give plots that allow us to determine values of ΔH°? HINT: The notation for plotting graphs is always y-axis value vs. x-axis value Select one: a. 1/T as a function of Kcross out b. 1/T as a function of ln K cross out c. K as a function of 1/Tcross out d. ln K as function of 1/Tcross out e. K as a function of T
Computer output for fitting a simple linear model is given below.State the value of the sample slope for this model and give the null and alternative hypotheses for testing if the slope in the population is different from zero. Identify the p-value and use it (and a 5% significance level) to make a clear conclusion about the effectiveness of the model. The regression equation is Y - 78.8 -0.014. Predictor Coef SE Coef T P Constant 78.79 11.30 6.97 0.000...
#2
between two quantities can be established. Procedure: Use the following sets of data and work with each one. The equation for a linear graph is y mx+b, where m is the slope and b is the y-intercept DATA SET 1: Fahrenheit-vs-Celsius Fahrenheit Celsius 32 68 104 140 176 0 20 40 60 80 1. Using Data Set 1 above, graph Fahrenheit (y)-vs- Celsius (x), using the scatterplot function in excel, or another graphing software. Make sure you label the...
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