Mercury probably isn’t as adhesive as water
This statement is: False
Boiling is vaporization that occurs both below and at the surface of the liquid.
However, evaporation happens at the surface of the substance.
So, if you need to correct this statement, the correction would be:
Sublimation and evaporation happen at the surface of the substance.
The law of conservation of matter basically states that matter can’t be created or destroyed, only changed in form, so you can rule out any option that mentions destroying or creating matter. That leaves only option A. Atoms cannot be created or destroyed by chemical reactions.
Mass of Zn = 0.103 g
Volume of HCl (V) = 50.0 ml
Density of solution (D) = 1.00 g/ml
Mass of HCl = D*V = 1.00 g/ml * 50.0 ml = 50.0 g
initial temp T1 = 22.5 C
Final temp T2 = 23.7 C
specific heat c = 4.18 J/g C
The heat (Q) required to raise the temp is given as:
Q = mcΔT = mc(T2-T1)
= (0.103+50)g * 4.18 J/g C * (23.7-22.5) C = 251.3 J = 0.2513 kJ
To find ΔH in kJ/mol
# moles of Zn = mass of Zn/Atomic mass = 0.103/65.39 = 0.00158 moles
a) ΔH = 0.2513 kJ/0.00158 moles = 159.05 kJ/mol
b) A calorimeter is an isolated system where there is no exchange of heat/energy.
Work done is given as: W = PΔV
since ΔV = 0, as the volume remains constant
W = 0