Thermodynamics and Temperature Measurement
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Questions and Answers

What is the primary unit of temperature in the SI system?

  • Degrees Fahrenheit
  • Kelvin (correct)
  • Joules
  • Degrees Celsius
  • How does heat energy transfer between two bodies?

  • Simultaneously between both bodies
  • From hotter to colder body (correct)
  • From colder to hotter body
  • Only if they are the same material
  • Which liquid is commonly used in a liquid thermometer?

  • Water
  • Oil
  • Alcohol (correct)
  • Mercury (correct)
  • What describes thermal equilibrium?

    <p>The hotter body loses heat while the colder body gains heat until equal</p> Signup and view all the answers

    Which of the following statements about calories and joules is correct?

    <p>1 calorie is equal to 4.186 joules</p> Signup and view all the answers

    What type of energy is generated when friction causes molecular movement in a material?

    <p>Thermal energy</p> Signup and view all the answers

    What is the amount of heat energy required to raise the temperature of 1 gram of water by 1°C?

    <p>1 calorie</p> Signup and view all the answers

    Which unit is equivalent to 1000 calories?

    <p>Kilocalorie</p> Signup and view all the answers

    Which of the following is a common instrument used to measure heat?

    <p>Thermometer</p> Signup and view all the answers

    In which direction does heat energy naturally flow?

    <p>From hot to cold bodies</p> Signup and view all the answers

    What is the purpose of the constriction in a clinical thermometer?

    <p>To keep the mercury from dropping after removal</p> Signup and view all the answers

    What temperature range does a clinical thermometer typically measure?

    <p>35°C to 42°C</p> Signup and view all the answers

    Which of the following accurately describes the structure of a mercury thermometer?

    <p>It contains mercury in a fine bore capillary tube with no air</p> Signup and view all the answers

    Which of the following temperature scale conversions is correct?

    <p>100°C corresponds to 212°F</p> Signup and view all the answers

    Which temperature scale is most commonly used?

    <p>Fahrenheit</p> Signup and view all the answers

    Which temperature scale has a freezing point of water at 0°C?

    <p>Celsius</p> Signup and view all the answers

    What is the boiling point of water in the Kelvin scale?

    <p>373 K</p> Signup and view all the answers

    How many divisions are present between the freezing and boiling points of water on the Fahrenheit scale?

    <p>180</p> Signup and view all the answers

    Which of the following temperature values represents absolute zero on the Kelvin scale?

    <p>0 K</p> Signup and view all the answers

    What is the ratio of the intervals of Celsius to Fahrenheit?

    <p>5/9</p> Signup and view all the answers

    What is the formula to convert Celsius to Fahrenheit?

    <p>°F = (°C × 9/5) + 32</p> Signup and view all the answers

    What is the equivalent of normal body temperature, 37°C, in Kelvin?

    <p>310 K</p> Signup and view all the answers

    What is the term for the increase in volume of a substance due to heating?

    <p>Thermal Expansion</p> Signup and view all the answers

    Which equation correctly describes the conversion of Fahrenheit to Celsius?

    <p>°C = (°F - 32) × 5/9</p> Signup and view all the answers

    At what temperature does ice melt, according to the definition provided?

    <p>0°C</p> Signup and view all the answers

    How do you convert from Celsius to Kelvin?

    <p>Add 273 to the Celsius temperature</p> Signup and view all the answers

    What happens to a gas when it is cooled according to the change in state?

    <p>It condenses into a liquid</p> Signup and view all the answers

    What is the Fahrenheit equivalent of 98.6°F?

    <p>37°C</p> Signup and view all the answers

    Which process involves a liquid changing into vapor at a fixed temperature?

    <p>Vaporization</p> Signup and view all the answers

    What is the term for the decrease in volume of a substance due to cooling?

    <p>Contraction</p> Signup and view all the answers

    What should be avoided when measuring temperature with a laboratory thermometer?

    <p>Placing the thermometer's bulb in the water</p> Signup and view all the answers

    Given the Celsius to Fahrenheit conversion formula, what is the temperature in Fahrenheit when water is measured at 65°C?

    <p>149°F</p> Signup and view all the answers

    What is a characteristic property of the thermometric liquid used in thermometers?

    <p>It should expand uniformly with temperature changes</p> Signup and view all the answers

    What happens to the molecules of a substance when it is heated?

    <p>They gain energy, leading to increased temperature</p> Signup and view all the answers

    Why is alcohol sometimes used in thermometers instead of mercury?

    <p>Alcohol is non-toxic, making it safer for certain uses</p> Signup and view all the answers

    Which type of expansion occurs in all three states of matter?

    <p>All of the above</p> Signup and view all the answers

    Which statement correctly describes the effect of heat on gases compared to solids and liquids?

    <p>Gases expand significantly more than solids and liquids.</p> Signup and view all the answers

    What happens to the intermolecular space in a substance when it is heated?

    <p>It increases, resulting in expansion.</p> Signup and view all the answers

    What defines sublimation in terms of phase change?

    <p>Conversion from solid directly to gas.</p> Signup and view all the answers

    Which temperature value indicates the maximum limit for snow precipitation to occur?

    <p>2°C</p> Signup and view all the answers

    What is the term for the increase in length of a solid when heated?

    <p>Linear expansion</p> Signup and view all the answers

    What happens to most solids when they are cooled?

    <p>They contract</p> Signup and view all the answers

    Which of the following applications demonstrates thermal expansion in everyday life?

    <p>Loose electric wires</p> Signup and view all the answers

    During the experiment with metal rods, what is directly observed as the rod is heated?

    <p>The needle deflects</p> Signup and view all the answers

    Which type of expansion refers to the increase in the surface area of a solid?

    <p>Superficial expansion</p> Signup and view all the answers

    What happens to a bimetallic strip when the temperature increases?

    <p>It bends towards the metal with a lower expansion rate.</p> Signup and view all the answers

    What occurs to water when heated from 0°C to 4°C?

    <p>It contracts before expanding at higher temperatures.</p> Signup and view all the answers

    Which statement is true regarding the expansion of liquids?

    <p>Different liquids expand to different extents upon heating.</p> Signup and view all the answers

    In the activity demonstrating expansion in liquids, what was placed in the hot water baths?

    <p>Conical flasks containing equal amounts of liquids.</p> Signup and view all the answers

    Which of the following correctly describes the behavior of benzene compared to water when heated?

    <p>Benzene expands more than water.</p> Signup and view all the answers

    What is a key characteristic of liquids compared to solids?

    <p>Liquids have no definite shape but a fixed volume.</p> Signup and view all the answers

    What is the primary purpose of using bimetallic strips in devices?

    <p>To bend in response to temperature changes for switching circuits.</p> Signup and view all the answers

    What observation is made in the experimental demonstration of liquid expansion?

    <p>The liquids rise to different levels in the capillary tubes.</p> Signup and view all the answers

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