# Below 20K, The specific heat capacity c of silver varies with temperature

• Rifat amin
In summary, the conversation is about someone not following forum rules and asking for help without showing an attempt at a solution. The other person reminds them to always show their attempt and not ask if someone knows how to answer the question. The conversation ends with the person thanking the other for their feedback.
Rifat amin
Homework Statement
Below 20K, The specific heat capacity c of silver varies with temperature according to the equation
c
/
J /kg /K
=
1.5
x
10

4
(
T
/
K
)
3
+
6.0
x
10

3
T
/
K
. If a small silver sphere of diameter 4am and at 20K is placed in 25g of liquid helium at 4K, what fraction of the liquid will evaporate?
[Density of silver = 1.05E4 kg/m^3, specific latent heat of vaporisation of helium = 2.1E4 J/kg; boiling point of helium = 4K]
Relevant Equations
c
/
J /kg /K
=
1.5
x
10

4
(
T
/
K
)
3
+
6.0
x
10

3
T
/
K
Not attempt

Yikes, what happened to your equations?

Rifat amin said:
Not attempt

And keep in mind you *always* have to show your attempt at the solution before we can provide tutorial help. That's in the PF rules...

Don't ask "Do you know how to answer it?" (especially twice). That is disrespectful. @berkeman didn't answer your question, not because he doesn't know how, but because, as he clearly said, it is a forum rule that YOU must show some attempt at a solution before receiving help.

berkeman and Rifat amin
Solved

mjc123 said:
Don't ask "Do you know how to answer it?" (especially twice). That is disrespectful. @berkeman didn't answer your question, not because he doesn't know how, but because, as he clearly said, it is a forum rule that YOU must show some attempt at a solution before receiving help.
Thanks.

I appreciate you liking my post when it criticised you. That shows a good willingness to learn.

## 1. How does the specific heat capacity of silver change with temperature?

The specific heat capacity of silver typically increases with temperature, meaning that it requires more energy to raise the temperature of silver at higher temperatures compared to lower temperatures.

## 2. What is the specific heat capacity of silver at 20K?

At 20K, the specific heat capacity of silver is approximately 0.240 J/gK.

## 3. Does the specific heat capacity of silver show a linear relationship with temperature?

No, the specific heat capacity of silver does not show a linear relationship with temperature. It tends to increase at a decreasing rate as temperature increases.

## 4. What is the unit of measurement for specific heat capacity?

The unit of measurement for specific heat capacity is joules per gram kelvin (J/gK).

## 5. How does the specific heat capacity of silver compare to other metals?

The specific heat capacity of silver is relatively high compared to other metals, meaning that it requires more energy to raise the temperature of silver compared to other metals with lower specific heat capacities. However, it is not the highest among all metals.

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