Answer: A. Internal energy : May be viewed as the sum of the kinetic and potential energies of the molecules
B. Latent heat: The internal energy associated with the phase of a system.
C. Chemical (bond) energy : The internal energy associated with the atomic bonds in a molecule
D. Nuclear energy : The internal energy associated with the bonds within the nucleus of the atom itself
Explanation:
Internal energy is defined as the total energy of a closed system. Internal energy is the sum of potential energy of the system and the kinetic energy of the system. It is represented by symbol U.
Latent heat is the thermal energy released or absorbed by a thermodynamic system when the temperature of the system does not change. It is thus also called as hidden heat.
Chemical energy is the energy stored in the bonds of molecules.
Nuclear energy is the energy which is stored in the nucleus of an atom called as binding energy within protons and neutrons.
Beaker does thermometer measures the thermal energy in the air
The alignments of the planets would be the correct answer.<span />
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33.33 grams of CH4 would be formed from 25 g C.
C + 2H2 → CH4
from given reaction we can say that ,
2 moles of hydrogen is required for 1 mole of carbon and these will react to form 1 mole of methane.
atomic mass of Carbon = 12 gm
Molecular mass of H2 = 2(H)
= 2(1)
=2gm
moles = molecular mass / given mass
for C,
if 12 gm = 1 mole
then 25 gm = ? mole
=2.083 moles
1 mole of C will produce 1 moles of CH4
so, 2.083 moles of C also will produce 2.083 moles moles of CH4
molecular weight of methane= C+4(H)
= 12+4(1)
= 16 gm
amount of methane produced= moles × molecular mass
=2.083× 16
= 33.33 gm
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