Heat transfer basics
This always moves from a warmer object to a cooler object.
what is heat?
This is the unit used to measure temperature change per minute in an experiment.
➡️ What is degrees Celsius per minute?
As temperature increases, this of particles increases.
➡️ What is kinetic energy?
A reaction that releases heat to its surroundings is called this.
➡️ What is exothermic?
Sweating cools the body because heat is removed during this process.
➡️ What is evaporation?
When a metal fork is placed in ice water and gets colder, heat moves in this direction.
What is from the fork to the water?
If an object cools from 30°C to 18°C in 6 minutes, this is its rate of temperature change.
➡️ What is 2°C per minute?
Among equal samples of water, the one at the highest temperature has the greatest amount of this.
➡️ What is kinetic energy?
A reaction that absorbs heat and causes temperature to drop is called this.
➡️ What is endothermic?
Air escaping rapidly from a tire feels cold due to this effect.
➡️ What is the Joule–Thomson effect?
This type of heat transfer occurs when particles collide directly, such as when touching metal.
what is conduction?
This calculation is used to find the rate of temperature change.
What is change in temperature divided by time?
This best explains why syrup spreads faster in hot milk than cold milk.
➡️ What is particles moving faster at higher temperatures?
If a mixture’s temperature rises from 18°C to 29°C, this type of reaction occurred.
➡️ What is an exothermic reaction?
A water sample with the greatest exposed surface area will do this fastest.
➡️ What is warm to room temperature?
A material that allows heat to pass through easily, like metal, is called this.
what is a conductor?
If two objects cool for the same amount of time, the one with the larger temperature drop has this.
➡️ What is a faster rate of temperature change?
This happens to particle motion when a liquid is cooled.
➡️ What is it slows down?
When temperature steadily decreases during a reaction, energy moves in this direction.
➡️ What is from the mixture to the surroundings?
Wet cloths that lose more water will usually end with this type of temperature change.
➡️ What is a lower final temperature?
This type of material slows the transfer of heat, such as the rod that stayed hottest in Marcus’s experiment.
what is an insulator?
An object that changes temperature more slowly usually has a greater value of this physical property.
➡️ What is mass?
This thermometer liquid rises in warm water because this increases.
➡️ What is the kinetic energy of the liquid molecules?
After mixing two chemicals known to be endothermic, the final temperature will most likely be this compared to the starting temperature.
➡️ What is lower?
This explains why Pad D’s final temperature is between 15°C and 19°C based on evaporation.
➡️ What is losing a moderate amount of heat due to evaporation?