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strojnjashka [21]
3 years ago
5

In the chemistry laboratory why do scientists use a mortal and pestle

Chemistry
1 answer:
Dennis_Churaev [7]3 years ago
4 0
To increase surface area of a solute. 
<span>The mortar and pestle can make the solute from bulk to powder. </span>
<span>So the surface area will increase and the reaction rate or dissolving rate will also increase.</span>
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The normal boiling point of methanol is 64.7∘c and the molar enthalpy of vaporization of 71.8kj/mol. the value of δs when 1.11 m
maxonik [38]
The answer is 236.5 J/K

According to Δ G formula:

ΔG = ΔH - TΔS

when ΔG is the change in free energy (KJ)

and ΔH is the change in enthalpy (KJ)= ΔHvap * moles

                                                              = 71.8 KJ/mol * 1.11 mol
                                                             
                                                              =   79.7 KJ

and T is the absolute temperature (K)= 64 °C + 273°C = 337 K

Δ S is the change in entropy  KJ/K

by substitution:

when at equilibrium ΔG = 0 

∴ΔS = ΔH / T

       =79.7 KJ/ 337 K

     = 0.2365 KJ/K

     = 236.5 J/K


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Which group would Ns2np2 go into
FrozenT [24]

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