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Questions and Answers
What is the SI unit of heat?
What is the SI unit of heat?
- Calorie (cal)
- Kelvin (K)
- Watt (W)
- Joule (J) (correct)
How is temperature conversion from Celsius to Kelvin represented?
How is temperature conversion from Celsius to Kelvin represented?
- $t(k) = t°C / 273.15$
- $t(k) = t°C + 273.15$ (correct)
- $t(k) = t°C * 273.15$
- $t(k) = t°C - 273.15$
What is the definition of heat?
What is the definition of heat?
- A measure of hotness or coldness of a body.
- The ability to do work or cause a change.
- A form of energy flow between two bodies or between a body and its surroundings by virtue of temperature difference. (correct)
- The total internal energy of a system.
What is the temperature at the ice point in Kelvin?
What is the temperature at the ice point in Kelvin?
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According to the text, in which direction does heat flow?
According to the text, in which direction does heat flow?
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Study Notes
Heat and Temperature Concepts
- SI unit of heat is the Joule (J), which measures energy transfer due to temperature differences.
- Temperature conversion from Celsius to Kelvin is represented by the formula: K = °C + 273.15.
- Heat is defined as the energy transferred between systems or objects due to a temperature difference—essentially, heat flows from a hotter object to a colder one.
- Ice point, or the freezing point of water, occurs at 0°C, which is equivalent to 273.15 K in the Kelvin scale.
- Heat flows from areas of higher temperature to areas of lower temperature, aligning with the second law of thermodynamics.
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