Suppose you inhaled 1.00 liter of air at −30.0 ◦C and held this air long enough to heat it to body temperature, 37.0◦C. What would be the new volume of the air in the lungs assuming the pressure remained constant? 1. 1.28 L 2. 0.81 L 3. 1.23 L 4. 1.02 L 5. 0.97 L

1.28 L

Explanation:

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

where,

are the initial volume and temperature of the gas.

are the final volume and temperature of the gas.

We are given:

Putting values in above equation, we get:

Thus the new volume of the air in the lungs assuming the pressure remained constant is 1.28 L

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

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