Question

What is the amount of substance give the volume of 3.0 dm3

Answer 1

Work done =P×dV=3.0×(5.0−3.0)

=6.0litre−atm=6.0×101.3J

=607.8J

Let ΔT be the change in temperature

Heat absorbed =m×s×ΔT

=10.0×18×4.184×ΔT

Given, P×dV=m×s×ΔT

or ΔT=

m×s

P×dV

=

10.0×18.0×4.184

607.8

=0.807

Final temperature=290+0.807=290.807K

Answer 2

Answer:

In chemistry, concentration of a solution is often measured in molarity (M), which is the number of moles of solute per liter of solution. This molar concentration (ci) is calculated by dividing the moles of solute (ni ) by the total volume (V) of the:

c

i

=

n

i

V

The SI unit for molar concentration is mol/m3. However, mol/L is a more common unit for molarity. A solution that contains 1 mole of solute per 1 liter of solution (1 mol/L) is called “one Molar” or 1 M. The unit mol/L can be converted to mol/m3 using the following equation:

1 mol/L = 1 mol/dm3 = 1 mol dm−3 = 1 M = 1000 mol/m3