[email protected]

Calculating the Reaction Quotient, Q - Purdue Chemistry

In order to determine Q we need to know:the equation for the reaction, including the physical states, the quantities of each species (molarities and/or pressures), all measured at the same moment in time. To calculate Q:Write the eion for the reaction quotient. Find the molar concentrations or partial pressures of each species involved. Change in Enthalpy? (Chemistry) Bored Of StudiesSep 07, 2008 · Thus if you have an endothermic reaction, delta H is negative because heat is actually absorbed! (hence the minus mc in the equation). q = mc (delta T). (Not sure why your book would use (- delta H) - it was probably referring to endothermic/exothermic reactions, and

Dr. McCord Calorimetry

response, T. The heat capacity of the entire calorimeter will simply be C cal = q cal/T Now you can turn that equation around and use C cal and T to get q cal. The heat from the chemical reaction you are studying (q rxn) is equal to but opposite in sign from the value of q cal. That is q rxn = -q cal Bomb Calorimetry and U system Energetics:q = mct in celsius or kelvin?? - Chemistry Apr 07, 2016 · Q = mc(delta) T [so this is the equation that i remembered] T should be in Kelvin. However, it can be converted into celsius. You should refer to your question whether it is celsius or kelvin. But, I personally think writing it in kelvin will be fine in the IB exam. (I have seen kelvin as the answer for chemistry HL papers) Edit:Q should be in Joules = (J/gK) *K So K can be the right answer. Find the heat q using q=mc delta t equation Yeah ChemistryFeb 24, 2013 · Find the heat q using q=mc delta t equation. a piece of copper metal of mass 6.22 kg is heated from 20.5 degrees C to 324.3 degrees C. Calculate the heat absorbed by the metal. Specific heat is 0..386J/g degrees C.

How can you tell when to use q=mc delta t - Yeah Chemistry

Mar 06, 2013 · Using q=mc delta T find the final temperature:Effect of volume increase on temperature:Calculate the total heat change of water to water vapor:how much heat is given up when 20.0g of steam, at 120.0C is cooled to -15.0C:Find the final temperature when metal dropped into water at different temperature:Help with a q=mc delta t problem! Q = I × t :Quantity of Charge (Electricity) Calculations Q = 30,000 C t = 5 minutes Convert time in minutes to time in seconds by multiplying by 60 t = 5 min × 60 sec/min = 300 seconds What is the relationship between what you know and what you need to find out? Write the equation:I = Q ÷ t Substitute in the values and solve for I:I = Q ÷ t = 100 amps Specific heat and latent heat of fusion and vaporization Click to view14:57Feb 18, 2016 · Science AP®/College Chemistry going to be positive and they're going to be the same absolute value how do you find these we had a formula remember Q equals MC delta T which I like to remember because it looks like MCAT so MC this Delta looks like an a to me so it looks like Q equals Mk so I've got to use

physical chemistry - When is it okay to use $Q=mc\Delta T

You can use $q=mc\Delta T$ for any process in which heat is transferred, not just calorimetry. Generally, when a question talks about heat transfer, that means $q$. If the question meant enthalpy change, the question would have used the word "enthalpy". Under constant pressure conditions, the enthalpy change is equal to the heat transfer. q = mct - The Student RoomApr 04, 2009 · Report Thread starter 12 years ago. #14. (Original post by trance addict) i think youre getting confused. q = mct. m = mass of liquid (so this would be in grams) t = change in temperature. C is a specific constant to the liquid youre calculating energy for, e.g. for 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 that for all 3 quantities, you only need q=mC(delta)T vs. q=m(delta)Hvap - CHEMISTRY COMMUNITYJan 25, 2017 · Hi, my question is more general in terms of when calculating the heat needed for a reaction, how does one know whether to apply the q=mC(delta)T formula or the q=m(delta)Hphasechange formula? Or both? For example, problem 8.87 of the textbook requires the usage of both equations and separate times in the solution's calculations. Thanks!

In chemistry, how do you use the equation Q=mct? - Answers

The chemistry and scientific equation for the Beer Lambert Law is A=EBC. This equation can be used to calculate the Beer Lambert law, and you can use it yourself.