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8ml of hydrochloric acid is added to 10ml of a 1M soda. After this addition, the measure of the molar concentration of H30+ ion gives 10-7M. What is the concentration in mol/l of the acid solution?
Which of the following acids is the strongest?
A. HCN;pKa(HCN/CN3-)=9.2
B. HNO2;pKa(HNO2/NO2)=3.3
C. H3PO4;pKa(H3PO4/H2PO4-)=2.1
D. H2CO3;Ka(H2CO3/HCO3-)=4.5x10-7
E. H2SO3;Ka(H2SO3/HSO3-)=1.7x10-2
One mole of an ideal gas at 300K expands isothemally from 5.00 dm3 to 10.00dm3. Calculate the work done if the expansion is reversible
An engine containing 2 kg air as working substance is initially at 1 atm and 27 0C.
The system undergoes isochoric process to a point where pressure of the system is 2
atm. At this point heat is transferred to the air untill the volume doubles. Calulate
the total workdone and the amount of heat transferred to the air
the work done using the given state of equation. (B = -5.397 X 10-6 m3
/mol)
(note: volume at each stage should be near to the ideal gas volume)
PV
RT = 1 +
B
V
stable as compared to one Kekule structure:
∆fH*=(methane, g) = −84.85 kJ/mol
∆fH*=(ethane, g) = −94.85 kJ/mol
∆fH*=(ethylene, g) = −65.35 kJ/mol
∆fH*=(benzene, g) = −98.45 kJ/mol
C (graphite) → C (g); ∆H* = 714.39 kJ/mol
H2(g) → 2H(g) ∆H* = 435.89 kJ/mol
(here '*' denotes degree sign)
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#340153 on Dec 2023