Which of the following is an organic compound? ammonia (NH3) calcium sulfide (CaS) octane (C8H18) sulfur trioxide (SO3)
2 answers:
Answer : The correct option is, octane
Explanation :
Covalent compound : It is a compounds in which atoms are covalently bonded. It is formed by the equal sharing of electrons. These bonds are commonly formed between two non-metals.
Ionic compound : It is a compounds in which atoms are bonded through ionic bond. It is formed by the complete transfer of electrons. The atom that looses the electron is considered as electropositive atom and the atom that gains the electron is known as electronegative atom. These bonds are formed between one metal and one non-metal.
Organic compound : It is a hydrocarbon that contains hydrogen and carbon and the hydrogen and the carbon are covalently bonded to each other. There are two types of hydrocarbon which are saturated hydrocarbon and unsaturated hydrocarbon.
Saturated hydrocarbon : These are the compounds which containing single bonds between the carbon-carbon atoms. In saturated compounds, there are more number of hydrogen bonded with the carbon atom.
Unsaturated hydrocarbon : These are the compounds which containing double and triple bonds between the carbon-carbon atoms. In unsaturated compounds, there are less number of hydrogen bonded with the carbon atom.
From the given options, we conclude that
Ammonia , is the covalent compound in which two non-metals (nitrogen and hydrogen) are covalently bonded.
Calcium sulfide , is the ionic compound in which calcium (metal) and sulfur (non-metal) are bonded through ionic bond.
Sulfur trioxide , is the covalent compound in which two non-metals (sulfur and oxygen) are covalently bonded.
Octane , is an organic compound in which hydrogen and carbon atoms are present. It is a saturated hydrocarbon.
Hence, the correct option is, octane
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Answer:
Explanation:
CHECK THE COMPLETE QUESTION BELOW;
Suppose that 0.95 g of water condenses on a 75.0 g block of iron that is initially at 22 °c. if the heat released during condensation is used only to warm the iron block, what is the final temperature (in °c) of the iron block? (assume a constant enthalpy of vaporization for water of 44.0 kj/mol.)
Heat capacity which is the amount of heat required to raise the temperature of an object or a substance by one degree
From the question, it was said that that 0.95 g of water condenses on the block thenwe know that Heat evolved during condensation is equal to the heat absorbed by iron block.
Then number of moles =given mass/ molecular mass
Molecular mass of water= 18 g/mol
Given mass= 0.95 g
( 0.95 g/18 g/mol)
= 0.053 moles
Then Heat evolved during condensation = moles of water x Latent heat of vaporization
Q= heat absorbed or released
H=enthalpy of vaporization for water
n= number of moles
Q=nΔH
Q = 0.053 moles x 44.0 kJ/mol
= 2.322 Kj
=2322J
We can now calculate Heat gained by Iron block
Q = mCΔT
m = mass of substance
c = specific heat capacity
=change in temperature
m = 75 g
c = 0.450 J/g/°C
If we substitute into the above formula we have
Q= 75 x 0.450 x ΔT
2322 = 75 x 0.450 x ΔT
ΔT = 68.8°C
Since we know the difference in temperature, we can calculate the final temperature
ΔT = T2 - T1
T1= Initial temperature = 22°C
T2= final temperature
ΔT= change in temperature
T2 = T1+ ΔT
= 68.8 + 22
= 90.8 °C
=91°C
Therefore, final temperature is