Answer:
= -356KJ
<em>therefore, the reaction where heat is released is exothermic reaction since theΔH is negative</em>
Explanation:
given that enthalpy of gaseous reactants decreases by 162KJ and workdone is -194KJ
then,
change in enthalpy (ΔH) = -162( released energy)
work(w) = -194KJ
change in enthalpy is said to be negative if the heat is evolved during the reaction while heat change(ΔH) is said to be positive if the heat required for the reaction occurs.
At constant pressure the change in enthalpy is given as
ΔH = ΔU + PΔV
ΔU = change in energy
ΔV = change in volume
P = pressure
w = -pΔV
therefore,
ΔH = ΔU -W
to evaluate energy change we have,
ΔU =ΔH + W
ΔU = -162+ (-194KJ)
= -356KJ
<em>therefore, the reaction where heat is released is exothermic reaction since theΔH is negative</em>
Answer:
Magnesium
Explanation:
Using the KLMN styled electronic configuration, the electronic configuration of sulphur with atomic number 16 is 2, 8,6
What this means is that it needs extra 2 electrons to fill into its M shell to attain the octet configuration.
Now let’s look at Magnesium, with atomic number 12, the electronic configuration it has is 2,8,2.
This means it has 2 extra electrons to give away so as to attain its own stability.
The sulphur atom will gladly accept the two electrons which the magnesium atom wants to give away. This makes it the perfect element to be reacted with sulphur to make it attain its octet configuration
Answer:
The answer to your question is: 0.015 mole of NO
Explanation:
Data
Silver = Ag = 0.1 mole
Nitric acid = HNO3 = 10 ml 6 M
Balanced reaction
3Ag + 4HNO₃ ⇒ 3AgNO₃ + NO + 2H₂O
# moles of HNO₃ = 6(0.01) = 0.06
Limiting reactant HNO₃ because for the amount of silver given
the reaction needs 0.133 moles of acid, and there
are only 0.06
4 mol of HNO₃ ------------------- 1 mol of NO
0.06 mol of Ag ------------------ x
x = (0.06 x 1) / 4
x = 0.015 mol
Potential energy is stored energy that has not been used yet. kinetic energy is energy that is being used instead of being stored. batteries have stored energy that is not being used until the battery is put into a device that can convert the energy that is stored into energy that is used. in example, putting batteries into a remote puts the stored energy into use by powering the remote.
