Multiple Choice
Which type of thermocouple probe is most appropriate for accurately measuring the internal temperature of a pork roast during cooking?
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8. Thermochemistry
Thermal Equilibrium
Multiple Choice
In a sauna, why is only a small ladle-full of water poured onto the hot rocks at one time?
A
Because a small amount of water increases the temperature of the rocks.
B
To allow the water to quickly reach thermal equilibrium with the rocks and produce steam efficiently.
C
Because pouring more water would cool the rocks too rapidly, preventing steam formation.
D
To prevent the water from evaporating before it touches the rocks.
Verified step by step guidance1
Understand the concept of thermal equilibrium, which occurs when two objects in contact reach the same temperature, allowing efficient heat transfer.
Recognize that the hot rocks in a sauna have a high temperature and can transfer heat to water poured onto them, causing the water to evaporate and produce steam.
Consider what happens if a large amount of water is poured at once: the rocks lose heat rapidly, lowering their temperature and reducing their ability to produce steam efficiently.
Realize that pouring a small ladle-full of water allows the water to quickly absorb heat from the rocks, reaching thermal equilibrium rapidly and turning into steam without significantly cooling the rocks.
Conclude that this controlled, small amount of water maximizes steam production by maintaining the rocks' high temperature and ensuring efficient heat transfer.
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