1. The problem statement, all variables and given/known data Calculate your experimental value of absolute zero , how does your experimental value compare to the theoretical value -273C? 2. Relevant equations T_abs=(S1*T2-S2*T1)/(S1-S2) 3. The attempt at a solution This is all part of a lab. I'm not asking people to do any calculations. I'm more worried about my calculations from what I got and I'm pretty sure I did them correctly. The accepted value for absolute zero is -273C. The value I got when calculating was -72.18 C. My question is can air be treated as an ideal gas so that the calculation on absolute zero is possible? If air can't be treated as an ideal gas then it would explain the huge difference in my value vs the accepted value. Thanks!