SYSTEMS, PHASES AND COMPONENTS ASSIGNMENT

 

  • 1A phase is:
     A region in a system, of uniform or uniformly varying properties, bounded by a surface, where properties change abruptly.
     A substance in a system, produced by any equilibrium reaction in that system.
     A physical property of a system, which can be observed or measured.
     Any of the chemical substances in a system.
     The solid, liquid or gaseous part of a system.
     Any process such as boiling, evaporation, condensation, freezing, melting etc.

  • 2The number of components of a system is:
     The minimum number of chemical substances necessary to define the composition of all parts of the system.
     The number of substances in a system, produced by any equilibrium reaction in that system.
     The number of chemical substances in a system.
     The number of intensive physical properties of a system which can be measured
     The number of processes such as boiling, evaporation, condensation, freezing, melting etc. occurring in a system.
     The number of solid, liquid or gaseous parts of a system.

  • 3A very large stoppered flask contains small amounts of liquid water, ethanol and propanone under nitrogen, at room temperature.
    At equilibrium, what is the number of    phases? 0
     1
     2
     3
     4
     5
     Cannot tell

  • 4components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 5The system in the previous question, is heated until all the liquids evaporate.At equilibrium, what is the number ofphases?

     0
     1
     2
     3
     4
     5
     Cannot tell

  • 6components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 7A large sealed flask contains 0.1 mole of each of nitrogen, water, hexane, mercury and potassium sulphate, at room temperature. The solubility of K2SO4 in water is approximately 1 mol in 100 moles of water.At equilibrium, what is the number ofphases?

     0
     1
     2
     3
     4
     5
     Cannot tell

  • 8components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 9The flask in the previous question is heated so that the hexane evaporates.
    At equilibrium, what is the new number of    phases? 0
     1
     2
     3
     4
     5
     Cannot tell

  • 10components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 11A sample of water is placed in a flask, which is then cooled in liquid nitrogen (to -196(C). All the air is removed by pumping it out, and the flask is sealed and warmed until some (but not all) of the water melts.At equilibrium, what is the number ofphases?

     0
     1
     2
     3
     4
     5
     Cannot tell

  • 12components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 13A container of adjustable volume is completely filled with a concentrated aqueous solution of KNO3 at 50(C. The volume of the container is increased, so that some liquid evaporates, and the system is cooled until some KNO3 crystallises out.At equilibrium, what is the number ofphases?

     0
     1
     2
     3
     4
     5
     Cannot tell

  • 14components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 15The mixture in the previous question is further cooled until some of the water freezes.At equilibrium, what is the number ofphases?

     0
     1
     2
     3
     4
     5
     Cannot tell

  • 16components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 17On the planet Solarus, where the atmosphere is pure carbon dioxide, Capt. Flash Gordon mixes himself an iced gin & tonic in a closed cocktail shaker.In the shaker, what is the number of:phases?

     0
     1
     2
     3
     4
     5
     Cannot tell

  • 18components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 19If in the previous question, he had used vodka (assume a pure alcohol/water mixture), water (no tonic) and ice, what would have been the number ofphases?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 20components?
     0
     1
     2
     3
     4
     5
     Cannot tell

  • 21Consider the foam on the head of a glass of beer.What is the number ofphases?

     0
     1
     2
     3
     4
     5
     Cannot tell

  • 22components?
     0
     1
     2
     3
     4
     5
     Cannot tell

 

Mugisa Geofrey and SOLOMON TATWEBWA

Mugisa Geofrey Zziwa is a learning facilitator with Ultimate MultiMedia Consult. With knowledge of the following topics:  Digital Pedagogy training or digital teaching skills, how to integrate ICT in teaching.  Journalism and the Internet/Computers (How internet helps journalism)  Basic web design & CMS and Multimedia Content publishing  Digital security and safety basics for journalists  Best practices for ensuring safety online  Data Mashups  Collaborative digital content development tools  Live streaming and Live reporting  Immersive Storytelling tools and practices  Among others I have conducted a number of trainings which include: • Multimedia Journalism and Digital Safety training for university Students held in Makerere University, Kampala International University and Cavendish University and sponsored by the American Embassy Uganda. • Digital Pedagogy training for Science Technology Engineering and Mathematics (STEM) Teachers held in Iganga Girls SSS in Iganga District for Eastern region Uganda, St. Maria Gorretti in MPigi District for Central region Uganda, and Teso College ALOET for the Karamoja region Uganda. Sponsored by Forum for African Women Educationalists Uganda (FAWEU) Training Teachers on integration of ICT in teaching and delivering lessons to students. • Digital Pedagogy at American Center for Teachers by Teachers In Need (TIN) Uganda. • Facilitator on Digital Pedagogy with ICT Teachers Association Uganda (ITAU) at American Center, Kyebambe Girls SSS in FortPortal for western region Uganda, Dr. Obote College Boro Boro Lira for Nothern Region Uganda.

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Mugisa Geofrey and SOLOMON TATWEBWA
5 years ago

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