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Thermochemistry Review

Thermochemistry Review. The number of degrees between the freezing point of water and the boiling point of water on the Celsius scale is:. 0 100 180 273. The smallest change in temperature is represented by:. one Celsius degree one Fahrenheit degree one Kelvin one centigrade degree.

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Thermochemistry Review

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  1. Thermochemistry Review

  2. The number of degrees between the freezing point of water and the boiling point of water on the Celsius scale is: • 0 • 100 • 180 • 273

  3. The smallest change in temperature is represented by: • one Celsius degree • one Fahrenheit degree • one Kelvin • one centigrade degree

  4. If the same amount of heat were applied to four samples, which sample would have its temperature raised the most? • c = 0.200 J/goC • c = 0.450 J/goC • c = 0.650 J/goC • c = 2.200 J/goC

  5. Which of the following tools would be used in an experiment to calculate heat transfer between two objects? • Calorimeter • Barometer • Thermometer • Meter Rule • More than one correct answer

  6. List the phases of water in order, from the phase with the slowest molecular movement to the phase with the fastest molecular movement. • Gas-Liquid-Solid • Liquid-Solid-Gas • Solid-Liquid-Gas • Gas-Solid-Liquid

  7. The temperature at which water changes to steam is known as the: • boiling point. • evaporation temperature. • sublimation plateau. • melting point.

  8. When you put ice in a drink to cool it: • coldness is transferred from the ice to the warmer drink. • heat is transferred from the warmer drink to the cooler ice. • heat from the ice is lost to the warmer liquid around it. • the ice cracks and releases cold air molecules that cool off the drink.

  9. The amount of thermal energy or heat stored in an object depends on: • the mass of the object. • the temperature of the object. • the amount of energy that the particular material stores per degree of temperature. • All of the above

  10. When thermal energy flows, it raises the temperature of some substances more than others. This property of a substance is called: • specific heat. • latent heat. • dew point. • equilibrium.

  11. If you hold a paper cup containing hot chocolate in your hand, thermal energy: • does not flow. • flows from the air to the hot chocolate. • flows from the hot chocolate to your hand. • flows from your hand to the hot chocolate.

  12. Which of the following has a melting point greater than room temperature? • oxygen • water • iron • bromine

  13. Which of the following about an ice cube floating in a glass of water is correct? • The temperature of the ice cube increases. • The temperature of the ice cube decreases. • The temperature of the ice cube remains constant. • The temperature of the ice cube will fluctuate.

  14. The quantity of heat required to change the temperature of 1 g of a substance by 1C is defined as ____. • a joule • specific heat • a kilocalorie • density

  15. Which of the following substances has the highest specific heat? • steel • water • alcohol • chloroform

  16. The amount of heat needed to melt solid at a constant temperature is called ____. • heat of fusion • heat of solidification • heat of reaction • heat of vaporization

  17. During a phase change, the temperature of a substance ____. • increases • decreases • remains constant • may increase or decrease

  18. Which of the following is equal to 273 Kelvin? • -20 Celsius • 0 Celsius • 273 Celsius • 373 Celsius

  19. To calculate the amount of heat absorbed as a substance melts, which of the following information is NOT needed? • the mass of the substance • the specific heat of the substance • the change in temperature • the density of the sample

  20. A/An _____ is a substance that slows down the rate of a reaction. • catalyst • inhibitor • reactant • product

  21. A/An _____ lowers the activation energy required for a reaction to take place. • catalyst • inhibitor • reactant • product

  22. A collision requires _____ to be effective. • only enough energy • favorable orientation • enough energy and favorable orientation • a reaction mechanism

  23. In an exothermic reaction, equilibrium shifts _____ when temperature is raised. • to the left • to the right • to the center • none

  24. In an endothermic reaction, equilibrium shifts _____ when temperature is lowered. • to the left • to the right • to the center • none

  25. At what stage of a reaction do atoms have the highest energy? • reactant stage • product stage • activated complex formation • The stage of highest energy depends on the atom.

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