Answer:
red
1: The SCP/E-water molecule: oxygen atom (red color) and hydrogen atoms (white color).
Explanation:
A positive cahnge of enthalpy, ΔH rxn = + 55 kJ/mol, for the forward reaction means that the reaction is endothermic, i.e. the reactants absorb energy and the products are higher in energy.
Activation energy is the difference in the energy level of the reactants and the peak in the potential energy diagram (the energy of the transition state).
For an endothermic reaction, the products will be closer in energy to the transition state than what the reactans will be; so, the activation energy of the reversed reaction is lower than the activation energy of the forward reaction.
Activation energy of reverse and forward reactions is related by:
Activation energy of reverse rxn = Activation energy of forward rxn - ΔH rxn
=> Activiation energy of reverse rxn = 102 kJ/mol - 55 kJ/mol = 47 kJ/mol
Answer: 47 kJ/mol
Explanation:
When an organic compound reacts with oxygen and results in the formation of water and carbon dioxide then this type of reaction is known as combustion reaction.
Therefore, when benzene reacts with oxygen and results in the formation of carbon dioxide and water then we can say that benzene has undergone combustion reaction.
Mendeleev organized it by the atomic mass and mosely did it by atomic number
Answer:
specific weight = 49.7 lb/ft^3
specific gravity = 0.797
Explanation:
From Appendix A,
pk = 1.58 slug/ft^3
pea = 1.53 slug/ft^3
volume of kerosene is
Vk = 14 ft^3 - 10 ft^3 = 4 ft^3
The total weight of the mixture is therefore
W = pk g Vk + pea g Vea
= (1.58 slug/ft3) (32.2 ft/s^2) (4 ft^3) + (1.53 slug/ft^3) (32.2 ft/s^2) (10 ft^3)
= 696.16 lb
The specific weight and specific gravity of the mixture are
γm = W
/V
γm = 696.16 lb/ 14 ft^3 = 49.73 lb/ ft^3 = 49.7 lb/ft^3
Sm = γm / γv
Sm = 49.73 lb/ft^3/ 62.4 lb/ft^3 = 0.797