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What reaction shows that the enthalpy of formation of CS2 is Hf 89.4 kJmol?
The enthalpy of formation of carbon disulfide (CS2) can be indicated by the reaction: C(s) + 2 S(s) → CS2(l). This reaction represents the formation of one mole of CS2 from its elements in their standard states. The enthalpy change associated with this reaction is +89.4 kJ/mol, meaning that 89.4 kJ of energy is absorbed when one mole of CS2 is formed from solid carbon and solid sulfur.
What is the difference between physical and chemical dissolution?
Physical dissolution is purely mechanical; an example would be shaking a bottle of Italian salad dressing, the different ingredients mix but don't form a new substance. Chemical dissolution produces new substances; for example, mixing NaOH with HCl forms water and table salt, two chemicals different from what you had to begin with. Also, dissolving table salt in water is a chemical change, though it may not seem like it.When adding water:NaCl (s) => Na+ (aq) + Cl- (aq)This is a very soluble ionic compound and it changes from a neutral compound to ions, a chemical change.The dissolution of non-ionic compounds, such as sugar, is not a chemical reaction because sugar doesn't separate to ions in solution. i.e., this is a physical dissolution.When adding water:C6H12O6 (s) => C6H12O6 (aq)The dissolution of weak electrolytes is somewhat more complicated. Let's consider acetic acid (vinegar).When adding water:CH3COOH (s) => CH3COOH (aq)Although we write the dissolution for a weak acid or weak base this way, it differs from the sugar example because we know that, actually, some of the molecules go to CH3COO- and H3O+. We don't write this, though, because although some molecules have undergone a chemical reaction, that population is a minority.
Are Fizzing or foaming evidence that a chemical change may have occurred?
yes it s an evidence that a chemical change has been occurred
What is the substance called that undergoes a change in a chemical change?
The compound(s) (there can be more than one) that exist(s) before the change is/are called reactant(s).
Does magnesium hydroxide dissolve in water?
Magnesium oxide does not "dissolve" in hydrochloric acid. Dissolution is a physical change. When magnesium oxide is mixed with hydrochloric acid, a chemical reaction takes place: Mg(s) + 2HCl ---> MgCl2(aq) + H2(g)
What is the bond structure of cs2?
S=c=s
What will happen when you add cs2 to fe plus s and fes?
When CS2 is added to reaction mixture Fe + S = FeS , it would dissolve the excess 'S' leaving the solids Fe and FeS without any change.
Which reaction shows that the enthalpy of formation of CS2 is H89.4 kj mol?
C(s) + 2S(s) + 89.4kJ --} CS2(l)
Which reaction shows that the enthalpy of formation of cs2 is hf 89.4 kJ mol?
C(s) + 2S(s) + 89.4 kJ --> CS2(l)
Equation for the heat of formation of carbon disulphide?
The heat of formation (∆Hf) of carbon disulfide (CS2) can be calculated using the standard enthalpies of formation of its constituent elements as follows: ∆Hf (CS2) = ∆Hf(C) + 2∆Hf(S) − ∆Hf(CS2). The standard enthalpies of formation for carbon (C) and sulfur (S) are known values and can be used in the calculation.
What is the chemical equation for the dissolution of copper(II) sulfate pentahydrate in water?
The chemical equation for the dissolution of copper(II) sulfate pentahydrate in water is: CuSO4 5H2O (s) Cu2 (aq) SO42- (aq) 5H2O (l)
What is the product of Carbon and Sulfur?
S=C=S Carbon disulphide CS2
What is the difference between physical and chemical dissolution?
Physical dissolution is purely mechanical; an example would be shaking a bottle of Italian salad dressing, the different ingredients mix but don't form a new substance. Chemical dissolution produces new substances; for example, mixing NaOH with HCl forms water and table salt, two chemicals different from what you had to begin with. Also, dissolving table salt in water is a chemical change, though it may not seem like it.When adding water:NaCl (s) => Na+ (aq) + Cl- (aq)This is a very soluble ionic compound and it changes from a neutral compound to ions, a chemical change.The dissolution of non-ionic compounds, such as sugar, is not a chemical reaction because sugar doesn't separate to ions in solution. i.e., this is a physical dissolution.When adding water:C6H12O6 (s) => C6H12O6 (aq)The dissolution of weak electrolytes is somewhat more complicated. Let's consider acetic acid (vinegar).When adding water:CH3COOH (s) => CH3COOH (aq)Although we write the dissolution for a weak acid or weak base this way, it differs from the sugar example because we know that, actually, some of the molecules go to CH3COO- and H3O+. We don't write this, though, because although some molecules have undergone a chemical reaction, that population is a minority.
What is polarity of cs2?
CS2 is a nonpolar molecule because the dipole moments of the two C-S bonds in opposite directions cancel each other out. Therefore, CS2 does not have an overall dipole moment.
Does CS2 have any polar bonds?
Yes, a CS2 molecules contains two double covalent bonds.
How many lone pair electron are in CS2?
C=4e- (on periodic table you find C in the Group 4 / 4valence electrons) S=6e- (Group 6/ 6 valence electrons) multiply by 2 12e- 4e- + 12e- ____ 16 valence electrons in CS2
What is the balanced equation for the dissolution of solid sodium hydrogen carbonate?
No equation, it is not a chemical reaction.
