ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: kenhung123 on November 10, 2010, 07:39:21 pm

Title: Kelvins
Post by: kenhung123 on November 10, 2010, 07:39:21 pm: How come VCAA uses degrees and Kelvins interchangeably? Like in 2008 mcq 14, they said the specific heat capacity of water is 4.18J/ml/K then the answer is in J/degree celcius?
Title: Re: Kelvins
Post by: Xavier1234 on November 10, 2010, 07:40:48 pm: essentially, 1C=274K. an increase in 1C = increase in 1K. it doesnt really matter.
Title: Re: Kelvins
Post by: kenhung123 on November 10, 2010, 07:47:16 pm: Oh right did not realise that. THanks!
Title: Re: Kelvins
Post by: Studyinghard on November 10, 2010, 07:54:13 pm: 273 K *
Title: Re: Kelvins
Post by: jasoN- on November 10, 2010, 07:54:34 pm: Nah he is right
0C = 273K
Title: Re: Kelvins
Post by: Studyinghard on November 10, 2010, 07:55:38 pm: touche~
Title: Re: Kelvins
Post by: Edmund on November 10, 2010, 11:10:13 pm: Basically you are using $\delta T$ in the E=mcT formula. As others have mentioned Celsius and Kelvin share the same scale so it doesn't matter. But you should convert to Kelvins to ensure consistency.