1. Given that: i) the cp of Al is given by cp=20.7+0.0124*T (J/mol/K) in the temperature range from 298 to 932 K, ii) the c, of Al;O3 is given by cp=106.6 + 0.0178*T - 2,850,000*T² (J/mol/K) in the temperature range from 298 to 1800 K, and iii) for Al2O3 its enthalpy of formation from elements at 298 K is -1675.7 kJ/mol, please calculate enthalpy content of Al and Al2O3 at 298 and 900 K.

1. Given that: i) the cp of Al is given by cp=20.7+0.0124T (J/mol/K) in the temperature range from 298 to 932 K, ii) the c, of Al;O3 is given by cp=106.6 + 0.0178T - 2,850,000*T² (J/mol/K) in the temperature range from 298 to 1800 K, and iii) for Al2O3 its enthalpy of formation from elements at 298 K is -1675.7 kJ/mol, please calculate enthalpy content of Al and Al2O3 at 298 and 900 K.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 2RQ: What are the three states in which matter is commonly found?

See similar textbooks

Similar questions

What was the mass of water used if 249 g of a copper ball, initially at 314°C was immersed into the water and allowed to mix until thermal equilibrium was reached at 38.8°C? The specific heat of water is 4.184 J g ° C and that of copper is 0.387 J g ° C. The initial temperature of the water was 22.6°C.
Calculate the work done (in J/mol) for mechanically reversible, isothermalcompression if 1 mol of methyl chloride undergoes a pressure change from 1 bar to 60 bar at 125 ℃. The species follows the virial equation of state ? = 1 +??b. Determine the molar volume (in cm3/mol) of n-heptane at 535 K and 25 bar basedon the generalized compressibility factor correlation. c. Estimate the density (in g/cm3) of saturated liquid ammonia at 320 K.
2 properties are given to define the state of water using pure substance tables given below. Determine the properties or properties requested from you, asked for the following situations, using thermodynamic tables, and show each operation on your paper.a. T=200°C, x=0.95 ν=?b. P=0.275 mPa, ν=0.05 m3 / kg, x=?c. x = 1.0, ν=0.8 m3 / kg, P=? T=?d. P=1700 kPa, T=3000°C, x=? h=? Phase State=?e. T=5000°C, h=3487.7 kJ / kg, P=? x=? ν=?
Define the Specific gravities of some substances at 0°C?
Imagine that we put a 140-g steel ball with an initial temperature of 119°C into a cup containing 140 g of water with an initial temperature of 11°C. What is the final equilibrium temperature of this system in degrees Celsius? The specific heats of steel and water are 450 J kg−1 K−1 and 4186 J kg−1 K−1,respectively.The final equilibrium temperature of this system is _______degreesC.
DEFINE THE PHASES OF A PURE SUBSTANCE
If a certain system has one component, at what number of phases will the formula of degrees of freedom starts to become invalid?
Calculate Z, HR, and SR by the Redlich/Kwong equation for benzene at 575 K and 30 bar, and compare the results with values found from suitable generalized correlations.
Explain in words and/or equations the differences and/or relation-ships between the following: (Image offers symbols in a clearer fashion)(a) Gi_bar, μi, Gi (Molar gibbs free energy, chemical pontential, gibbs free energy)(b) G^R and G^E (Gibbs residual and Gibbs excess property [ie. Excess = molar vs ideal mixture])(c) f_i and P (fugacity and pressure)
A gold block initially at 62.9°C is put into 120 grams of H20 at 25.8°C in a container. The mixture at thermal equilibrium reached a temperature of 28.3°C. What is the mass of gold used?
In the engine of a car that uses petrol as fuel, when the piston is at its highest position, air at 10 bar and 100°C enters the cylinder. Without any change in the volume, ignition occurs, and the air temperature rises to 1500°C. What is the air pressure after the ignition? (Select the closest value)[Whenever necessary, assume air as an ideal gas and consider R = 287 J/(kg.K).]
A tank contains exactly 1 kg of water consisting of liquid and vapour in equilibrium at 1.5 MPa. If the liquid occupy one-fourth the volume of the tank and vapour occupy 3/4 the volume of the tank, what is the enthalpy of the contents of the tank?