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### 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.

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