Can Bob measure heat flow and entropy on a glacier using a metal rod experiment?

In summary, Bob is conducting an experiment with heat on a glacier using a two part metal rod made of silver and lead. The left rod is insulated and placed in boiling water while the right end is placed in the glacier. The heat flow per second through the rod can be calculated using the equation S = Q/T, where Q is the heat flow and T is the temperature. The temperature at the interface between the two rods can be calculated as well. The change in entropy of the teapot, glacier, and universe can also be calculated in one second. It is unclear if the values of conduction coefficient for silver and lead are provided.
  • #1
TungYee32
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Homework Statement



Bob who is working on a glacier wants to experiment with heat and has constructed a two part metal rod. The left rod is silver and has length L1 = .5454 M, and has a cross sectional area A = 3.1416 CM^2. It is joined end to end with a lead rod of identical diameter and length L2 = .3554 M. Bob has insulated the curved surface, placed the left end in a pot of boiling water and the right end in a hole in the glacier. After thermodynamic equilibrium has been achieved, there is a puddle of water in the glacier and the assumption that the right end is at a temperature T1 = 0.00 deg C.

1) Calculate the heat flow per second through the rod.
2) Calculate the temperature, T2, at the interface between the two rods.
3) Calculate the change in entropy of the teapot in one second.
4) Calculate the change in entropy of the glacier in one second.
5) Calculate the change in entropy of the universe in one second.

Homework Equations



S = Q/T


The Attempt at a Solution

 
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  • #2
show what ur attempt...
 
  • #3
values of conduction coefficient of silver and lead are provided or not?
 

1. What is heat flow?

Heat flow is the transfer of thermal energy from one object or substance to another due to a difference in temperature. It can occur through conduction, convection, or radiation.

2. How is heat flow related to entropy?

Entropy is a measure of the disorder or randomness of a system. Heat flow increases entropy by distributing thermal energy and increasing the number of possible microstates within a system.

3. What is the second law of thermodynamics?

The second law of thermodynamics states that in a closed system, entropy will always increase over time. This means that energy will naturally flow from areas of higher concentration to areas of lower concentration, until equilibrium is reached.

4. How does heat flow affect the environment?

Heat flow can have a significant impact on the environment, as it can cause changes in temperature and affect the Earth's climate. It can also contribute to the melting of glaciers and ice caps, and impact the growth and survival of plants and animals.

5. Can heat flow be reversed?

Yes, heat flow can be reversed through a process called heat transfer. This involves using external energy sources, such as a heat pump, to move thermal energy from a colder area to a warmer area. However, this process requires more energy than it produces, making it inefficient and not truly reversible.

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