1. What is the difference between heat and temperature?
a. [Heat is the transfer of thermal energy and temperature is themeasurement of that energy transfer]
b. [Heat is the measurement of energy transfer and temperature isthe transfer of thermal energy]
c. [Heat and temperature mean the same thing - the transfer ofthermal energy]
2. What is "internal kinetic energy"?
a. [Moving energy that you cannot see with the naked eye (akamicroscopic)]
b. [Moving energy that you can see with the naked eye (akamacroscopic)]
c. [All forms of energy]
3. What is "internal potential energy"?
a. [Stored energy that you cannot see with the naked eye (akamicroscopic)]
b. [Stored energy that you can see with the naked eye (akamacroscopic)]
c. [All forms of energy]
4. What the difference is between "thermal energy" and"heat"?
a. [Thermal energy and heat mean the same thing. There is nodifference between them.]
b. [Heat results from thermal energy by either a change in phase ora difference in temperature.]
c. [Thermal energy results from heat either by a change in phase ora difference in temperature.]
5. In ionic bonding, one or more valence electrons aretransferred from one atom to another. When this transfer occurs,the receiving atom is now __________ charged.
a. [Positively charged]
b. [Negatively charged]
c. [Neutrally charged]
6. The solid state of ice is less dense than its liquidstate.
a. [True] b. [False]
7. Concrete has a higher heat capacity than water.
a. [True] b. [False]
8. Thermohaline circulation is driven by:
a. [Density] b. [Gravity] c. [Latitude] d. [Temperature] e.[Wind]
1. What is the difference between heat and temperature?
a. [Heat is the transfer of thermal energy and temperature is themeasurement of that energy transfer]
b. [Heat is the measurement of energy transfer and temperature isthe transfer of thermal energy]
c. [Heat and temperature mean the same thing - the transfer ofthermal energy]
2. What is "internal kinetic energy"?
a. [Moving energy that you cannot see with the naked eye (akamicroscopic)]
b. [Moving energy that you can see with the naked eye (akamacroscopic)]
c. [All forms of energy]
3. What is "internal potential energy"?
a. [Stored energy that you cannot see with the naked eye (akamicroscopic)]
b. [Stored energy that you can see with the naked eye (akamacroscopic)]
c. [All forms of energy]
4. What the difference is between "thermal energy" and"heat"?
a. [Thermal energy and heat mean the same thing. There is nodifference between them.]
b. [Heat results from thermal energy by either a change in phase ora difference in temperature.]
c. [Thermal energy results from heat either by a change in phase ora difference in temperature.]
5. In ionic bonding, one or more valence electrons aretransferred from one atom to another. When this transfer occurs,the receiving atom is now __________ charged.
a. [Positively charged]
b. [Negatively charged]
c. [Neutrally charged]
6. The solid state of ice is less dense than its liquidstate.
a. [True] b. [False]
7. Concrete has a higher heat capacity than water.
a. [True] b. [False]
8. Thermohaline circulation is driven by:
a. [Density] b. [Gravity] c. [Latitude] d. [Temperature] e.[Wind]
Related textbook solutions
Related questions
As entropy increases there will be more useful energy to doâworkâ. True or false?
False. As entropy increases, there will generally be less usefulenergy to do work. We can think of entropy as usually being presentin the form of heat energy. Imagine a car motor, which attempts toturn chemical potential energy into kinetic energy (movement). Lessefficient motors will get hotter for the same amount of fuelconsumed. When you drive a car you hope that most of the fuelenergy is converted into kinetic energy and not lost as heat(entropy). The hotter the car (and thus the more entropy) the lessefficient the ability to do âworkâ (the moving of the vehicle). |
| True. As entropy increases, there will generally be more usefulenergy to do work. We can think of entropy as usually being presentin the form of heat energy. In most biological and mechanicalsystems it is heat energy which is captured to do useful 'work'.Heat energy, the random movement of molecules, and increases inentropy are central to doing useful work. |
Biological systems sometimes appear on the surface to break theSecond Law of Thermodynamics â by seemingly increasing the order inthe overall system. They donât. Why?
| a. Earth (and living things on it) are not a closed system. Thesun's constant input of energy in the form of photons is harnessedby living things to create internal order within themselves. Butwithout such a constant input of energy, most biological systems onearth would break down. |
| b. The Second Law tells us that no natural process can occurunless it is also associated with an increase in the entropy of theuniverse. A living organism (such as an animal or plant) brings inmatter and energy from its environment and uses this to creategreater order within its body: the processes of life. But it isimportant to keep in mind that all animals and plants are also partof a larger system of the environment around them. While creating asmall âpocketâ of order, the processes of life (metabolism,movement, etc..) releases heat into the environment â thusincreasing the entropy of the universe and following the2nd law. |
| c. Living things, by harnessing energy to create order (withinand around themselves) actually create a paradox in questionssurrounding the first and second laws of thermodynamics andseemingly violate many previously held assumptions. |
| d. Both a and b above are correct. |
When plants capture energy in the photons of sunlight andconvert that energy into the chemical bonds of organic molecules,are they creating new energy?
| No, the energy is being transferred from one form into another.But no new energy is being created. |
| No, the overall total energy is decreasing over time. |
| Yes, by capturing photons, the plants are creating newenergy. |
| Yes, by capturing photons, the plants are creating new energy -of a different wavelength. |
Enzyme Activity
1. Briefly explain the principle of spectrophotometry.
2. Which of the following statements is true about enzymes?(check all correct answers)
__ enzymes act on (are specific for) one or just a fewsubstrates | ||
__ enzymes can be denatured (loose their tertiary/quaternarystructure and activity) by extreme conditions such as heat, high orlow pH,or presence of organic solvents | ||
__most enzymes are DNA | ||
__ enzymes are protein | ||
| __enzymes perform best at specific conditions of temperature, pHand salt concentration 5. Which enzymes break the following macromolecules? Match the following with their correponding answers: ___ Nucleic acids A. proteases or proteinases such as pepsin ___ Cellulose B. none ___ Triglycerides C. lipases ___ Proteins D. amylases ___ Starch E. nucleases 6.Match the following enzymes totheir products. Answers ___ pepsin, trypsin and other digestive proteases A.Nucleotides ___ salivary and pancreatic amylases and other enzymes B. AminoAcids ___ lipases C. Monosaccharides ___ nucleases D. fatty acids and glycerol 7. Based on experiments, what is the effect of extremeconditions of pH and temperature (boiling tube) on enzymeactivity? 8. ATP stores energy in the form of___ ___ Chemical energy ___ Kinetic energy ___ Thermal energy ___ Activation energy 9. An allosteric site in anenzyme is____ __ the site where reactions occur __ the site that binds aregulator __ the site that binds thesubstrate __ the site that binds the product 10. Enzymes increase the rate of reactions by making thetransition state less stable. __ False 11. Enzymes increase the rate of reactions by placing reactingparts of the molecule in favorable positions. 12. Which of the followingis a mechanism for regulation of enzymes? 13. Which of the following represents a correct order of eventsin an enzyme catalytic cycle? 1.enzyme changes shape 2.substrate binds to active site 3.substrate is converted to products 4. products are released from activesite __ 1>2>3>4 __ 2>1>3>4 __ 3>2>1>4 __ 2>4>3>1 |
