If the value of heat, q, is positive when the temperature of a sample of water changes, then : the temperature of water was increased.
What is the relation between heat flux and temperature?
A substance's temperature is a macroscopic indicator of how quickly the atoms or molecules inside are vibrating about their mean locations. The increase in kinetic energy of these particles is reflected as an increase in temperature when heat is applied to a body.
The heat q and the temperature change Δ T : connection is the mathematical relationship at the core of this inquiry.
q = m c Δ T ,
where c is the substance's specific heat capacity and m is the substance's mass. The last two amounts can never be negative, it should be noted.
A positive value of heat hence always suggests a positive change in temperature. In other words, if heat is positive, the substance has received heat energy, increasing its ultimate temperature over its initial temperature.
Question:
If the value of heat, q, is positive when the temperature of a sample of water changes, then:
a. the temperature of water was decreased.
b. the temperature of water was increased.
c. it depends on whether mass and specific heat values are positive or negative.
d. None of the above.
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