Answer:
I think it is acute angle.
Explanation:
Because it is an angle between 0° and 90°. Hope this answer wil help you.
Answer:
62.06 g/mol
Explanation:
We are given that a solution containing 10 g of an unknown liquid and 90 g
Given mass of solute =
=10 g
Given mass of solvent=
=90 g
Freezing point of solution =-3.33
C
Freezing point of solvent =
C
Change in freezing point =Depression in freezing point
=Freezing point of solvent - freezing point of solution=0+3.33=
Hence, molar mass of unknown liquid is 62.06g/mol.
Answer:
d
Explanation:
First law of thermodynamics
It is also known as energy conservation law.It state that net work in a cyclic process is equal to net heat in that cycle.
From first law
Q=ΔU + W
ΔU = Q - W
ΔU is the change in internal energy of gas.
Q is heat transfer from the system or to the system.
W is the work done by the system or on the system.
If work done on the system then it will be taken as positive and If work done by the system then it will be taken as negative.
If heat taken by system it will taken as positive and If heat rejected by system it will taken as negative.
So Q will be positive if system gains heat and work will be positive if work is done on the system.
