Temperature Conversion Quiz
40 Questions
2 Views

Temperature Conversion Quiz

Created by
@SnappyHeliotrope6951

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the equivalent temperature in Kelvin for 37°C?

  • 309 K
  • 312 K
  • 311 K
  • 310 K (correct)

    • 1°C corresponds to a change of 1 K.

    True

    Convert 39°C to Fahrenheit.

    102.2°F

    To convert Celsius to Kelvin, you add __________.

    <p>273.15</p> Signup and view all the answers

    Match the temperatures in Celsius with their equivalent in Kelvin:

    <p>36°C = 309 K 37°C = 310 K 39°C = 312.15 K 5°C = 278.15 K</p> Signup and view all the answers

    Which of the following formulas is used to convert Fahrenheit to Celsius?

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

    To find body temperature in Fahrenheit, you multiply the Celsius value by 9/5.

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

    What is the temperature range in Kelvin between 36°C and 37°C?

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

    Which of the following statements is true regarding physical and chemical changes?

    <p>A physical change does not change the identity of a substance.</p> Signup and view all the answers

    Diagrams (b) and (c) represent physical changes.

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

    What are the two types of numbers used in chemistry?

    <p>Exact and inexact numbers.</p> Signup and view all the answers

    An example of an exact number is __________ as it is defined.

    <p>12 in the definition of a dozen</p> Signup and view all the answers

    Which diagram represents a physical change?

    <p>Diagram (d)</p> Signup and view all the answers

    Inexact numbers can only be derived from counting.

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

    Define significant figures in measurements.

    <p>Significant figures indicate the precision of a measured quantity.</p> Signup and view all the answers

    Match the type of number to its definition:

    <p>Exact Number = A number with a defined value Inexact Number = A number derived from measurement</p> Signup and view all the answers

    How many significant figures are in the number 305?

    <p>3</p> Signup and view all the answers

    Zeros located to the left of the first nonzero digit are considered significant figures.

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

    What is one way to express a number that has ambiguous significant figures?

    <p>Scientific notation</p> Signup and view all the answers

    The number 1.200 has __________ significant figures.

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

    Which of the following numbers has two significant figures?

    <p>0.0023</p> Signup and view all the answers

    The number 100 may have __________, __________, or __________ significant figures.

    <p>one, two, or three</p> Signup and view all the answers

    Match the following descriptions with the correct number of significant figures:

    <p>0.0023 = 2 significant figures 50.08 = 4 significant figures 1.30 × 10^2 = 3 significant figures 100 = Ambiguous significance</p> Signup and view all the answers

    When a number has a decimal point, any trailing zeros are considered significant.

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

    What is the mass of the gas when the container is filled with it?

    <p>1.9 g</p> Signup and view all the answers

    The density of the gas is expressed in g/cm³.

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

    What is the volume of the container in cm³?

    <p>985.0</p> Signup and view all the answers

    Density is calculated using the formula: density = mass / __________.

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

    Match the following values with what they represent:

    <p>124.6 g = Mass of the empty container 126.5 g = Mass of the container with gas 1.9 g = Mass of the gas 9.850 × 10² cm³ = Volume of the container</p> Signup and view all the answers

    What is the final density of the gas rounded to correct significant figures?

    <p>1.9 × 10^-3 g/cm³</p> Signup and view all the answers

    The mass of the gas can be determined without any calculations.

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

    What is the appropriate number of significant figures for the calculated density of the gas?

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

    What should you do if the leftmost digit to be dropped is equal to or greater than 5?

    <p>Round up</p> Signup and view all the answers

    Exact numbers have a limited number of significant figures.

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

    What determines the number of significant figures in the result of a multiplication or division operation?

    <p>The original number with the smallest number of significant figures.</p> Signup and view all the answers

    In calculations with multiple steps, it is best to retain at least one extra digit until the end to minimize ______.

    <p>rounding error</p> Signup and view all the answers

    Match the following operations with their outcome in terms of significant figures:

    <p>Addition = Result determined by the least number of decimal places Multiplication = Result determined by the least number of significant figures Subtraction = Result determined by the least number of decimal places Division = Result determined by the least number of significant figures</p> Signup and view all the answers

    What is the result of rounding 11.2154 to the correct number of significant figures if 1.4 has 2 significant figures?

    <p>11</p> Signup and view all the answers

    Rounding errors can be avoided by rounding at each step of a multi-step calculation.

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

    When adding 317.5 mL and 0.675 mL, the result should be reported as ______ mL.

    <p>318.2</p> Signup and view all the answers

    Study Notes

    Temperature Conversion

    • Normal human body temperature varies from approximately 36°C (morning) to 37°C (afternoon).
    • Conversion to Kelvin:
      • 36°C = 309 K
      • 37°C = 310 K
    • A 1°C change corresponds to a 1 K change.

    Temperature Formulas

    • Celsius to Fahrenheit:
      [(°C × \frac{9°F}{5°C}) + 32°F]
    • Fahrenheit to Celsius:
      [(°F - 32°F) × \frac{5°C}{9°F}]

    Physical vs Chemical Changes

    • Physical Changes: Identity of the substance remains unchanged.
    • Chemical Changes: Identity of the substance changes post-reaction.
    • Example: Certain diagrams may represent chemical changes (b & c) while others may depict physical changes (d).

    Uncertainty in Measurements

    • Measurement types:
      • Exact numbers (defined values)
      • Inexact numbers (derived from measurement).
    • Significant figures reflect the precision of a measured value.

    Significant Figures Rules

    • Non-zero digits are always significant.
    • Zeros between non-zero digits are significant.
    • Leading zeros are not significant.
    • Trailing zeros are significant only if there is a decimal point.
    • Ambiguity in trailing zeros can be resolved using scientific notation.

    Rounding Rules

    • If the digit to be dropped is 5 or greater, round up.
    • In calculations, retain one extra digit to minimize rounding errors.

    Calculations with Significant Figures

    • In multiplication/division, the result should reflect the least number of significant figures in the inputs.
    • Exact numbers do not limit significant figures in results.
    • For multi-step calculations, minimize rounding error by keeping more digits until the final result.

    Example Problems

    • Sample calculations involve adding, subtracting, multiplying, and dividing measured values while adhering to significant figure rules.
    • The density calculation requires steps: First, determine mass, then divide by volume, applying significant figures rules.

    Density Calculation Example

    • Given a container mass of 124.6 g and a filled mass of 126.5 g:
      • Mass of gas = 126.5 g - 124.6 g = 1.9 g
      • Volume = 9.850 × 10² cm³
      • Density = mass/volume = 1.9 g / 9.850 × 10² cm³ = 1.9 × 10⁻³ g/cm³.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your understanding of temperature conversion from Celsius to Kelvin. This quiz covers normal human body temperature and the range it spans throughout the day. Use the formula K = °C + 273.15 to solve the problems presented.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser