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If the total change in free energy of a molt en metal is
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The Science and Engineering of Materials (MindTap Course List)
- Maximum solubility in FCC austenite at 1147 °C is 2.04 wt% 2.14 wt% 14.2 wt% O 0.022 wt% Oarrow_forwardFor a hypothetical material, experiments show that a sample containing 1 billion atoms has 40 vacancies under equilibrium conditions at 600 degrees Celsius. Determine the energy for vacancy formation in the material at 600 degrees Celsius.arrow_forwardThe force of attraction between a divalent cation and a monovalent anion is 8.02x10-9 N. If the ionic radius of the cation is 0.060 nm, (q=1.6x10-19 C, k0=9x109 V∙m/C). What is the anion radius?arrow_forward
- I need the solution of this question please please please quickly Thanksarrow_forwardwhat is the delta H of 40 g of silver dropping from 300 K to 270 K? c = 0.25arrow_forwardCopper at 500 °C has 1.10×1015 vacancies/cm³. The atomic weight of Cu is 63.55 g/mol and the density at this temperature is 8.96 g/cm³. Avogadro constant NA ~ 6.022×1023 atoms/mol. Boltzmann constant (K) - 8.62×10-³ ev/atom • K. (a) What is the activation energy required to create a vacancy in Cu? (b) Cu is then cooled to 400 °C. What will be the number of vacancies per cubic centimeter? Assume that the change in the density in the cooling is negligible.arrow_forward
- Calculate the residual molar entropy for molecular crystals of 1,3,5-Trichlorobenzenearrow_forward1. For some hypothetical metal the equilibrium number of vacancies at 750°C is 2.8×1024?−3. If the density and atomic weight of this metal are 5.60 ? ??3⁄ and 65.6 ?/???, respectively, calculate the fraction of vacancies for this metal at 750°C. 2. Calculate the number of vacancies per cubic meter in iron at 850°C. The energy for vacancy formation is 1.08 eV/atom. The density and atomic weight for Fe are 7.65 g/cm3 and 55.85 g/mol, respectively. Answer both pleasearrow_forwardTwo glasses of tea that there is an aluminium stirrer in one of them and there is a silver stirrer in the other one are delivered to two people who ordered hot tea in a tea shop. If we know that temperatures of tea and glasses are 100°C, both of the stirrers are 25°C and if we suppose that the glasses are provide full thermal isolation, calculate equilibrium temperatures of two glasses.arrow_forward
- Question 1Helium gas is contained in a cylinder by a gas-tight piston which can beassumed to move without friction. The gas occupies a volume of 1 x 10^-3m^3 temperature of 300K and a pressure of 1 x 10^5 Pa.(a) Calculate :i.the number of helium atoms in the container,ii.the total KE of the helium atoms(b) Energy is now supplied to the gas in such a way that the gas expands andthe temperature remains constant at 300K. State, and explain what changes, if any, will have occurred in the following quantities :i. The internal energy of the gasii. The root-mean-square speed of the helium atomsiii. The density of the gas.(Given : Boltzmann's constant = 1.38 x 10^23 JK^-1)arrow_forwardAt 660°C the fractional concentration of vacancies in aluminum is 9 × 10-5. The energy for vacancy formation is therefore: a. 0.72 eV b. 1.44 eV c. 0.79 eV d. 0.75 eV e. 0.68 eVarrow_forward3. A block of pure iron needs to be converted to steel. The density of iron is 7.86x10^3kg/m^3, and the atomic weight is 0.0558kg/mol. The concentration of carbon at position A is 4x10^26 at/m^3. The carbon atomic weight is 0.012kg/mol. Carbon must be diffused into the iron to convert it to steel. It is desired to have 1025 atoms of carbon per m' at point B. Position A is 1mm from position B. Assume that you have 1m^3 of iron. You heat the material uniformly to 1200°C. Do, carton = 79x10 * m/sec, Ea = 83kJ/mol, and the density of carbon is 2260kg/m^3. (4pts) 1mm Fe block A What is Dearbon at 1200°C in m?/sec? i. ii. Calculate the FLUX (J) of carbon atoms in atoms per m²-sec at 1200°C? B.arrow_forward
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