One of the important things about the definition of temperature in equation T3.12 is that we can use it to infer the entropies (and thus the multiplicities) for objects even when we can’t easily construct a detailed model that would allow us to calculate those multiplicities directly. Consider the following examples. (a) Melting a gram of ice at 0°C requires adding 333 J of heat energy. How much must the ice’s entropy increase as it melts? The increase in the entropy of the ice is _____ J/K. (b) A typical person dissipates about 60 W of energy into a room at 20°C even when just sitting. Assuming that the room’s temperature doesn’t increase very much while absorbing this energy, by about how much must absorbing this person’s energy increase the room’s entropy in 100 minutes? The increase in the entropy of the room is ______J/K.
One of the important things about the definition of temperature in equation T3.12 is that we can use it to infer the entropies (and thus the multiplicities) for objects even when we can’t easily construct a detailed model that would allow us to calculate those multiplicities directly. Consider the following examples.
(a) Melting a gram of ice at 0°C requires adding 333 J of heat energy. How much must the ice’s entropy increase as it melts?
The increase in the entropy of the ice is _____ J/K.
(b) A typical person dissipates about 60 W of energy into a room at 20°C even when just sitting. Assuming that the room’s temperature doesn’t increase very much while absorbing this energy, by about how much must absorbing this person’s energy increase the room’s entropy in 100 minutes?
The increase in the entropy of the room is ______J/K.
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