chem
posted by Lily on .
1. Suppose that a recipe calls for an oven temperature of 189°F. Convert this temperature to degrees Celsius and to kelvins.
I found that Celsius is 87.2, plug it in K=C+273, got 360.2 but it was wrong.
(e) Neon, the gaseous element used to make electronic signs, has a melting point of 248.6°C and a boiling point of 246.1°C. Convert these temperatures to kelvins.
 Plugged it in K=C+273 and had the same exact problem as the top too. Help me!! What am I doing wrong?

1.
Recall that the formula for converting deg F to deg C is
C = (5/9)*(F  32)
Substituting,
C = (5/9)*(189  32)
C = (5/9)*(157)
C = 87.2 deg Celsius
To convert to Kelvin,
K = C + 273.15
K = 87.2 + 273.15
K = 360.37 Kelvin
2.
K = C + 273
K = 248.6 + 273.15
K = 24.55 Kelvin (melting point)
K = C + 273
K = 246.1 + 273.15
K = 27.05 Kelvin (boiling point)
Your answers are correct. I don't know why they're wrong, probably there's a typo or something...
Hope this helps~ :)