Answer:
Water's high heat of vaporization allows dogs to cool themselves by panting.
Explanation:
Vaporization or Evaporation is the process in which the substance is converted into gas (vapors). This is an endothermic reaction and requires energy to be carried out. In dogs this phenomenon is being carried out in order to cool the body.
As the water molecules are evaporated it results in the removal of highly energetic molecules leaving a low energy molecules behind. Hence, cooling is achieved.
I can help. First you want to write out each reactant and product with enough space to write in coefficients. Then box the reactants and products to emphazise how the elements shouldnt change. Afterwards, draw a line in front of the box for you to write in the coefficients.Now we srart balancing. To make things easier, you should always follow the method of : (Metals, Nonmetals,Oxygen,Hydrogen) in that order. By balancing each elememt/chemical this way it should make balancing them easier.
So to acryally perform it you're going to look at your first element (while still following the method) and then look over onto the other side to see what coefficient to place. Then after that element is balanced, you move onto the next element. Remember that everytime you balance an element, start over to make sure all of the other elements are still balanced before proceeding.
Explanation:
Carbon exists in several isotopes. ... Carbon has the atomic number of 6 which means that all isotopes have the same proton number. However, the number of neutrons is different, thus giving different mass numbers. Carbon-12 has 6 neutrons, carbon-13 has 7 neutrons, and carbon-14 contains 8 neutrons.
When you want to melt an ice, you only need the latent energy of fusion, <span>δhfus. We use the given value, then multiply this with the given amount to determine the amount of energy. Since the energy is per mole basis, use the molar mass of ice which is 18 g/mol. The solution is as follows:
</span>ΔH = 5.96 kJ/mol * 1 mol/18 g * 500 g
<em>ΔH = 165.56 kJ</em><span>
</span>
Answer:
A) 8.08*10^-10 cm^-1
B) 1.27 * 10^-5
Explanation:
A) PERMEABILITY OF THE MEMBRANE to the material = K * D/(dx) ---- (1)
K = J / (Cl - Cr )
= 0.234 * 10^-12 / (2.3*10^-6 M - 0 )
= 10 *10^-6 M
dx = 10*10^-6 m * 100 cm
= 10 *10^-4 cm
D = 0.8 * 10^-5 cm^2s^-1
input the calculated values into equation 1
permeability of the membrane = 8.08*10^-10 cm^-1
B) equivalent relative area available for the diffusion of the material
at thickness of membrane = 10*10^-6 m
can be calculated using this relation = ---------- (2)
flux = 0.234 * 10^-12 mol.cm^-2.s^-1
thickness = 10*10^-4 cm
diffusion coefficient = 0.8 * 10^-5 cm^2.s
Cl = 2.3*10^-6 m
input the above values into equation 2
equivalent relative area available for the diffusion of the material
= 1.27 * 10^-5