You are watching: Q=mct what is c
an ext accurately :
has units the joules .The basic unit of fixed is the kilogram - 1 gram is 10^-3 kg and you need to stick to this.Units that
would be kelvins obviously.To gain a betterworld2016.orgnsistent equation where the systems on both sides must complement up girlfriend would need c to have units of
- you acquired the systems of Q wrong to begin off with.
m is in kg.delta t is in Kelvin. C is in some really lengthy crap that ns can"t it is in bothered to look up at the mo"!
c is the details heat capacity of the liquidalso regularly youll must betterworld2016.orgnvert that formula come delta H, which in case
will offer you kjmol^-1and note: delta T deserve to be in DEGREES, the change will be specifically the very same
Great, many thanks guys!But, in the question, it claims the details heat capacity of water is 4.18 JK(-1)g(-1)In a instance like this, do I use the mass in g instead of in Kg?
fixed should constantly be in gramsso that be whatever x 10^3for the warmth capactiy, just stick the number in
(Original article by trance addict) fixed should always be in gramsso the be every little thing x 10^3for the heat capactiy, just stick the number in
i m really sorry to protrude right into this threadjust a rapid questioni have actually multiple questions and also answers from mine teacher whereby none are betterworld2016.orgnverted right into Kelvins-these room for reactions involving neutralisationany guess as to why?
(Original short article by trance addict) sorry simply for the question over itd it is in mass x10^3 due to the fact that you were given the amount in KG
(Original short article by Malsi101) i m really sorry to protrude into this threadjust a rapid questioni have actually multiple questions and also answers from mine teacher by which none space betterworld2016.orgnverted into Kelvins-these space for reactions including neutralisationany guess as to why?
(Original post by BrightGirl) gotcha. So basically I use everything mass form is specified in the details heat capacity?
i think youre acquiring betterworld2016.orgnfusedq = mctm = mass of liquid (so this would be in grams)t = readjust in temperatureC is a details betterworld2016.orgnstant come the liquid youre calculating power for, e.g. For water itd it is in 4.2 J g^-1 K^-1, you just put the number right into the formula in the exam.. Infact you can do the for every 3 quantities, friend only must specifiy the unit for the end energy transferred which will constantly be in joules
(Original write-up by trance addict) ns think youre obtaining betterworld2016.orgnfusedq = mctm = massive of liquid (so this would be in grams)t = adjust in temperatureC is a specific betterworld2016.orgnstant come the liquid youre calculating energy for, e.g. Because that water itd be 4.2 J g^-1 K^-1, you just put the number into the formula in the exam.. Infact you can do the for every 3 quantities, girlfriend only need to specifiy the unit because that the finish energy moved which will always be in joules
(Original write-up by BrightGirl) yeah i think i am also oh ok for this reason they won"t intend me to betterworld2016.orgnvert anything?thanks for helping
c should simply go directly in,t have to go directly in as wellg might need to be betterworld2016.orgnverted come gramsand climate the energy is offered in joules and also may must be betterworld2016.orgnverted depending upon what lock want, and also np
(Original article by trance addict) c should simply go right in,t have to go right in as wellg might need to be betterworld2016.orgnvertedand then the power is provided in joules and may have to be betterworld2016.orgnverted relying on what lock want, and also np
i"m no 100% certain if this is betterworld2016.orgrrect however apparently you didn"t need the q=mct equation...you were meant to usage c and the various other numbers they gave you, rearrange that in some means and you"d acquire delta S. So then you"d usage the G=H - TS equation to work-related out the temperature...I gained a weird answer when I offered q=mct, but my friend told me the they go what i said over and they acquired 63.9 or something.I don"t really recognize if that"s betterworld2016.orgrrect, I simply thought i"d put it out there
(Original write-up by BrightGirl) Hello, stupid question yet what space the devices for every of these things?q = kj?m = g or kg?c = JKg (little -1"s after the K and g)delta t = Kelvin or degrees?
Q is in Joules or KiloJoules relying on the systems you use for Cm need to be in Kilograms (unless your C is every gram)C is in either JKg-1 OR KJKg-1for T it is irregularity as both have the very same step size.So it depends on the provided units for C yes, really what you need to use because that the others. Though one would mean c come be every gram... For this reason m would be grams.The gold RULE s to it is in betterworld2016.orgnsistent with the units you use.
(Original post by BrightGirl) gotcha. So usually I use whatever mass type is stated in the specific heat capacity?
Yes. Or everything else is specified in the details heat capacity. What you really need, with the particular heat capacity, is the systems for every little thing value you"re given. Then just make certain you are working through that value so that your units minimize down come the unit you desire your final answer in.
(Original write-up by Champagne Supernova) m is in kg.delta t is in Kelvin. C is in part really long crap that i can"t it is in bothered to look up in ~ the mo"!
See more: What Continents Are In Both The Eastern And Southern Hemispheres Of The World
A-level Chemistry assist
Last-minute A-level Chemistry revision: a crammer�s overview
GCSE Chemistry help
GCSE Science help