Ethylene glycol is the main component in automobile antifreeze. To monitor the temperature of an auto cooling system, you intend to us a meter that reads from 0 to 100. You devise a new temperatrue scale based on the approximation melting and boiling points of a typical antifreeze solution (-45 degrees C and 115 degrees C) you wish these points to correspond to 0 degrees A and 100 degrees A respectively.
Derive and expression for converting between degrees Fer. and degrees A.
2006-08-13 15:36:46 · 2 answers · asked by Anonymous in Education & Reference ➔ Homework Help
_45 deg = 0 and 115 deg = 100. (just as with water!).
However , BP will be different if liquid is under pressure as in a car radiator. Temperature under these circumstances need to be considered, not just straight BP. The other end of the temperature range is only slightly influenced by pressure - low pressure rather than high, and as low pressure is not a problem in a radiator there is little need to consider this.
Converting to deg C would be more important than converting to F. This is because all your question is based on this scale, not F. It would appear that thihis part of the question is useless, ie why do it?
The formula would be deg A = (C+45) / 160. Thgis would give you a temp range of 100 deg's with the zero being the FP of Ethylene Glycol and 100 being it's BP.
2006-08-13 15:50:42 · answer #1 · answered by jemhasb 7 · 0⤊ 0⤋
First define what zero and one hundred is on your new scale. Is Zero when the fluid becomes solid? (As in frozen)
Is the percentage of Ethylene Glycol the same in all radiators you are to test?
If the percentage is the same, size does not matter.
Is one hundred on your scale when the fluid becomes another form, such as steam?
Is all the pressures on your radiators the same?
Pressure changes boiling points.
Basically -45C will be your starting point, with 115C the top point, so each degree in your new scale will be equal to 1.5 C.
2006-08-13 22:46:48 · answer #2 · answered by dogwarrior2001 4 · 0⤊ 0⤋