(of a reaction or process) accompanied by or requiring the absorption of heat.
Answer: g
Explanation:
0.92g/mL • 237mL/1cup - the mL cancel out leaving just grams
Answer:
The pH of a 4.4 M solution of boric acid is 4.3
Explanation:
at t=0 cM 0 0
at eqm
So dissociation constant will be:
Give c= 4.4 M and = ?
Putting in the values we get:
Also
Thus pH of a 4.4 M solution is 4.3
Lose 1 electron
It will give it to an atom with more electrons. For example, Lithium (which has 1 valence electron) would give it to an atom that has more than 4 valence electrons
Explanation:
Given temperatures are as follows.
Heat capacity for acetic acid = ![2.06 J/g^{o}C](https://tex.z-dn.net/?f=2.06%20J%2Fg%5E%7Bo%7DC)
Melting point of acetic acid = ![16.64^{o}C](https://tex.z-dn.net/?f=16.64%5E%7Bo%7DC)
Enthalpy of fusion for acetic acid = 11.73 kJ/mol
Number of moles of acetic acid = ![\frac{154 g}{60.05 g/mol}](https://tex.z-dn.net/?f=%5Cfrac%7B154%20g%7D%7B60.05%20g%2Fmol%7D)
= 2.564 mol
Now, conversion of solid acetic acid at
to liquid acetic acid at ![16.64^{o}C](https://tex.z-dn.net/?f=16.64%5E%7Bo%7DC)
We know that,
= ![2.564 mol \times 11.73 kJ/mol](https://tex.z-dn.net/?f=2.564%20mol%20%5Ctimes%2011.73%20kJ%2Fmol)
= 30.075 kJ
Also, conversion of liquid acetic acid at
to gas at ![39.5^{o}C](https://tex.z-dn.net/?f=39.5%5E%7Bo%7DC)
=
= 7252.1064 J
= 7.252 kJ (as 1 kJ = 1000 J)
Total heat energy required = ![q_1 + q_2](https://tex.z-dn.net/?f=q_1%20%2B%20q_2)
= 30.075 + 7.252
= 37.327 kJ
Thus, we can conclude that the amount of heat required is 37.327 kJ.