What variable/s play a role in determining how and when phase transitions happen? (Check all that apply) Properties of the Material/Substance Pressure Temperature

At what temperature does the first liquid phase form at 90% Ni? T(°C) 1600 1500 1400 1300 1200 1100 1000, L (liquid) L+α solidus liquidus 80 100 20 40 60 80 wt% Ni

100 atm 1 atm 0.118 atm 114 °C 184 °C 535 °C Temperature (not to scale) a.) Use the above generic phase diagram, clearly identify where you would find the following: Gas, Liquid, Solid, Triple Point, Draw arrows and label to indicate the six transitions (melting, freezing, sublimation, deposition, vaporization and condensation) b.) Based on the above phase diagram, what phase would you be in at a pressure of 50 atm and 300°C? c.) Based on the above phase diagram at what temperature in °C would vaporization occur under normal conditions? d.) If the pressure was 0.050 atm and 425°C, what phase would you be in? e.) If the pressure was 0.118 atm and temperature was 114°C, what phase(s) would you be in? f.) At approximately what temperature would the normal freezing point be in °C? g.) If the pressure was 0.105 atm and starting at a temperature of 32°C to 450°C what phase changes would occur (put in increasing temperature order). Pressure (not to scale)

help pls A two-phase phase diagram is shown. Answer the following questions t -1300 1500+ Temperature 1100 0 34 54! 166 482 80 Composition of Ni % 20 What is the composition (in % Cu) of the solid phase corresponding to the red dot in between the solidus and liquidus lines in the phase diagram? Just write the number. Do not write the % symbol. Question 17 2.33 100 An alloy is being made with 66% Ni and 34% Cu. When it is cooled from 1500°C to the temperature corresponding to the red dot in the phase diagram, how many kg of liquid is present in the mixture?

What is the composition, in wt% Cr2O3, of the liquid phase in an alloy containing 71 wt% Cr2O3 at 2200C?

4. A 4 m storage tank is filled with steam and maintained at a constant temperature of 250°C. The initial pressure is 20 bar. A valve is opened and 1 kg/min of steam leaves the tank, What is the initial mass of the steam in the tank? How much time does it take for the pressure to decrease to 5 bar? [CO2]

Temperature (°C) 700 600 0 500 400 300 0 (AI) a 5 a+L 10 Composition (at% Cu) 10 20 a +0 L 30 Composition (wt% Cu) 20 0+ L 0 (CuAl₂) 40 30 50 1200 1000 800 600 Temperature (°F) a) For the alloy represented by the phase diagram above, what is the wt% content of eutectic if an alloy of 2.5 wt% Cu is cooled very slowly from the molten state to 300°C? b) What phases are present in 2.5 wt% Cu material if it is quenched from 550°C?

According to the Bohr model of the atom   a. electrons in orbit around nuclei lose energy very slowly   b. electrons around a nucleus can have only certain particular energies and can only occupy certain specific orbits at particular distances from the nucleus   c. quantum theory is not applicable to the ultra-structure of an atom   d. all of the options are true

P-4 Please I need help with this question needed a very clear and step-by-step explanation and needed with clear handwriting please, will be really appreciated your help.