21-24

21. (I) Absolute zero is what temperature on the Fahrenheit scale? 22. (II) Typical temperatures in the interior of the Earth and Sun are about 4000C and 15106C, respectively. (a) What are these temperatures in kelvins? (b) What percent error is made in each case if a person forgets to change C to K ? 13-6 and 13-7 Ideal Gas Law 23. (I) If 3.50m3 of a gas initially at STP is placed under a pressure of 3.20atm, the temperature of the gas rises to 38.0C. What is the volume? 24. (I) In an internal combustion engine, air at atmospheric pressure and a temperature of about 20C is compressed in the cylinder by a piston to 91 of its original volume (compression ratio =9.0). Estimate the temperature of the compressed air, assuming the pressure reaches 40atm