Answer:
Explanation:
A spontaneous chemical process is one in which product formation is favoured under the specified conditions. A spontaneous process yields the product without an external input of energy.
A spontaneous reaction will always occur when ∆H is negative and ∆S is positive. These are the signs of enthalpy and and entropy change that gives rise to a spontaneous chemical process at all temperatures. Recall that a spontaneous process is one in which ∆G<0.
Based on the equation of the reaction, the moles of chlorine gas initially in the vessel is 0.12 moles
<h3>How many moles of chlorine were initially present?</h3>
The moles of chlorine initially present is determined using the equation of the reaction:
At STP, 1 mole of P4 reacts with 6 moles of chlorine.
Molar mass of P4 = 124.0 g
Molar mass of chlorine = 71.0 g
Mass of P4 in reaction vessel = 250 mg = 0.25g
moles of P4 in 0.25 g = 0.25/124 = 0.02 moles
0.02 moles of P4 will react with 0.02 × 6 moles of chlorine = 0.12 moles of chlorine.
Therefore, the moles of chlorine gas initially in the vessel is 0.12 moles.
Learn more about moles of a gas at: brainly.com/question/25417922
Answer:
The group reagent is H2S in the presence of NH4Cl .
Explanation:
Mn is fourth group radical in qualitative analysis ;
the group reagent is H2S in the presence of NH4Cl .
then Mn precipitates as buff coloured sulphide , which is soluble in HCl .
MnS + 2HCl ---------> MnCl2 + H2S
on heating the solution with NaOH with bromine water, manganesedioxide gets precipitated.
MnCl2 + 2NaOH --------> Mn(OH)2 + 2NaCl
Mn(OH)2 + O -------> MnO2 + H2O
whereas NiS is insoluble in HCl. the nickel chloride gives a scarlet red precipitate with dimethy gly oxime.
We can use the combined gas law equation to find the new pressure of the gas.
where P - pressure
V - volume
T - temperature
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
P1 - 795 mm Hg x 0.0013 atm/ mm Hg = 1.033 atm
T1 - 23.5 °C + 273 = 296.5 K
T2 - 31.7 °C + 273 = 304.7 K
substituting the values in the equation
P = 0.712 atm
the answer closest to this value is A) 0.723 atm
therefore answer is
<span>A) 0.723 atm</span>
