Pressure (atm) 100 10 0.1 0.01 -100 -75 -50 Phase Diagram gas None of the above -25 0 Temperature (°C) 25 50 75 100 According to the phase diagram above, what is the state of matter of the substance being analyzed at a pressure of 15.14 atm and a temperature of 80.72 °C? solid liquid

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This question is not a grade question, its just a pratice problem.

Refer to the following phase diagram (not to scale!) for hydrogen: 12.8 1.00 atm 0.071 13.9 14.0 20.3 33.2 T Kelvin A sample of hydrogen at a pressure of 7.10x10 atm and a temperature of 11.4 K is compressed at constant temperature to a pressure of 18.2 atm. Which of the following are true? Choose all that apply O The liquid initially present will vaporize. O The final state of the substance is a solid. O The sample is initially a solid. O No phase change will occur. O The sample is initially a gas. Submit Answer

= STATES OF MATTER Identifying phase transitions on a heating curve A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: temperature (°C) 170. 150. 130. 110. 90 70. 0. 10. What is the melting point of X ? Use this graph to answer the following questions: heat added (kJ/mol) What phase (physical state) of X would you expect to find in the flask after 5 kJ/mol of heat has been added? *C 30. X 40. (check all that apply) solid liquid gas 0/3 50.

The following information is given for benzene, C6H6, at 1atm: AHvap(80.1 °C) = 30.7 kJ/mol boiling point = 80.1 °C specific heat liquid = 1.74 J/g°C At a pressure of 1 atm, boiling point of 80.1 °C. kJ of heat are needed to vaporize a 40.2 g sample of liquid benzene at its normal

At constant pressure p1, the substance goes from solid state to gas as temperature increases   At constant temperature T1, the substance goes from gas state to liquid as pressure increases   The substance exists in the liquid phase by lowering the pressure and the temperature beyond T   At temperature T, the substance coexists in solid, liquid and gas phases   At constant pressure p2, the substance goes from solid state to liquid to gas as temperature increases.

Please don't provide handwritten solution

$ 4 R F [Review Topics] Refer to the following phase diagram (not to scale!) for neon: P atm 26.2 1 1.00 V 0.425 Choose all that apply T Kelvin A sample of neon at a pressure of 1.00 atm and a temperature of 26.3 K is heated at constant pressure to a temperature of 51.6 K. Which of the following are true? 5 The liquid initially present will solidify. The final state of the substance is a gas. The sample is initially a solid. One or more phase changes will occur. The sample is initially a liquid. T G 244 24.5 E B Cengage Learning Cengage Technical Support 6 MacBook Air Y H 27.1 44.4 & 7 N U J 8 M D-II 1 K ( 9 H 4 [References] O ) O L P 18 command A . ; option { [ Previous + ? 11 ✰ ✰ O Next> Save and Exit Ne X 1 delete 1: S + Update V D (?