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SOLUTION TO EXERCISE 15
SOLUTION TO EXERCISE 15 Using either P = nkT or PV = NRT, you can use ratios to determine the value for Mars as compared with Earth. Pressure (P) on Mars is 0.007 that of Earth, and temperature (T) is 250/273 that of Earth, so the number of gas molecules in 22.4 liters is 6 * 10^23 * 0.007 ------------------- = 4.6 * 10^21 250/273 Or, you can plug in R = 0.0821 (liters * atm) per (mole * K) to get PV 0.007 * 22.4 N = ---- = ------------ = 0.0076 mole = 4.6 * 10^21 gas molecules. RT 0.0821 * 250 |