What is the relation between °C, °F and Kelvin?
Differentiate between clinical thermometer and laboratory thermometer.
Answer (2)
Celsius, Fahrenheit, and Kelvin are three temperature scales with unique properties and applications. Clinical thermometers are designed for measuring human body temperature, while laboratory thermometers are built for a wider range of temperatures and scientific use. Understanding these distinctions helps clarify temperature measurement in various contexts.
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Relation between °C, °F, and Kelvin:
Temperature can be measured in three primary units: Celsius (°C), Fahrenheit (°F), and Kelvin (K). Each unit is used in different contexts and has its relation in conversion formulas.
From Celsius to Fahrenheit: ° F = ( ° C × 5 9 ) + 32 This formula helps to convert temperatures given in Celsius to Fahrenheit by multiplying with 5 9 , then adding 32.
From Fahrenheit to Celsius: ° C = ( ° F − 32 ) × 9 5 Here, you subtract 32 from the Fahrenheit value and then multiply by 9 5 to convert back to Celsius.
From Celsius to Kelvin: K = ° C + 273.15 The Kelvin scale is an absolute temperature scale starting from absolute zero. To convert from Celsius to Kelvin, you simply add 273.15.
From Kelvin to Celsius: ° C = K − 273.15 To convert Kelvin to Celsius, subtract 273.15 from the Kelvin value.
These formulas help understand temperature scales and conversions, important in scientific contexts.
Differentiate between Clinical Thermometer and Laboratory Thermometer:
Clinical Thermometer:
Designed to measure the human body temperature.
It has a limited range, usually from 35°C to 42°C (95°F to 108°F).
Has a constriction in the capillary tube, which prevents the mercury from falling back immediately, allowing for easier reading after removal.
Often used in homes and medical clinics.
Laboratory Thermometer:
Used for measuring temperatures other than the human body, such as in laboratory experiments.
Has a wider range of -10°C to 110°C (14°F to 230°F) or more.
Does not have a constriction, allowing the mercury to move freely back and forth.
Utilized in chemistry labs and research environments.
Both types of thermometers are essential tools in their respective fields, with clinical thermometers focusing on human health and laboratory thermometers used in scientific research.
