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Alexxandr [17]
3 years ago
12

Why is it important to keep good records during a scientific investigation?

Chemistry
1 answer:
love history [14]3 years ago
5 0

Answer:

everything needs to be documented in case you need to come back to it and to have evidence for yourself and others. as they say if it is not documented it wasn't done

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Show that the Joule-Thompson Coefficient is zero for ideal gas.
melomori [17]

Answer:

Joule-Thomson coefficient for an ideal gas:

\mu_{J.T} = 0

Explanation:

Joule-Thomson coefficient can be defined as change of temperature with respect to pressure at constant enthalpy.

Thus,

\mu_{J.T} = \left [\frac{\partial T}{\partial P} \right ]_H

Also,

H= H (T,P)

Differentiating\ it,

dH= \left [\frac{\partial H}{\partial T}\right ]_P dT + \left [\frac{\partial H}{\partial P}\right ]_T dT

Also, C_p is defined  as:

C_p = \left [\frac{\partial H}{\partial T}\right ]_P

So,

dH= C_p dT + \left [\frac{\partial H}{\partial P}\right ]_T dT

Acoording to defination, the ethalpy is constant which means dH = 0

So,

\left [\frac{\partial H}{\partial P}\right ]_T = -C_p\times \left [\frac{\partial T}{\partial P}\right ]_H

Also,

\mu_{J.T} = \left [\frac{\partial T}{\partial P}\right ]_H

So,

\left [\frac{\partial H}{\partial P}\right ]_T =-\mu_{J.T}\times C_p

For an ideal gas,

\left [\frac{\partial H}{\partial P}\right ]_T = 0

So,

0 =-\mu_{J.T}\times C_p

Thus, C_p ≠0. So,

\mu_{J.T} = 0

6 0
3 years ago
What is the formula for tetrasulfur hexabromide<br><br>If you answer I will give you a brainliest
gavmur [86]

Answer:

Tetrasulfur Dinitride   S4N2

Tetrasulfur pentoxide   S4N4

Tetrasulfur tetranitride  N4S4

Tetrasulfur pentoxide   S4N4

6 0
3 years ago
Which element have zero valency
choli [55]
The answer is Helium. hope its helpful (:
4 0
3 years ago
Which environmental conditions contribute most to the spread of bacteria?
Nostrana [21]
Answer: D

Explanation: Bacteria thrives in warm and moist environments.
6 0
3 years ago
What is the SI Unit used to measure the temperature of a substance?
ser-zykov [4K]

Answer:

kelvin

Explanation:

google

5 0
3 years ago
Read 2 more answers
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