All categories

3 years ago

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

You might be interested in

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