Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
In an experiment Temperature of Hydrochloric acid (HCl=1.020M) solution is 23.4 degrees celcius. The temperature of sodium hydroxide solution (NaOH = .907M) is also 23.4 degrees celcius. When 50mL of each are mixed together the final temperature is 29.2 degrees celcius.
a. q=mcΔT Insert your values and calculate q for your solution.
b. Calculate enthalpy of neutralization
i. qrxn= -qsoln
ii. Mole of NaOH or HCL neutralized (moles of reaction)
iii. Enthalpy of neutralization of reaction = qrxn/(moles of reaction)
c. Enthalpies are relative quantities measured as changes from some comparative states. The enthalpies of formation of elements in their standard states at 25 degrees celcius are taken to be zero by convention. The enthalpy of formation of a 1M solution of H+ (aq) is chosen by definition to be zero. Look up enthalpy of formation of H2O(l)..using that value and your results from the experiment calculate enthalpy of formation of OH- (aq).
Calculate the number of moles of Cl atoms in 1.81×1024 formula units of magnesium chloride,MgCl2 . Express your answer numerically in moles.
Consider 4 moles of a perfect gas with initial volume= 20dm^3, initial temp= 300K, and final volume= 60dm^3. What is the change in entropy for the system, surroundings, and total for the following processes:
a -gt b 2c this is the elementary gas-phase reaction that is carried out isothermally in a flow reactor without any
If a single pane glass window on a house has an area of 0.5 m^2 and is 3mm thick, what is rate of heat loss through this window on a cold winter day when the inside surface of the glass is 15?C and the outside surface is 5C
Phosphate systems form essential buffers in organisms. Calculate the pH of a buffer made by dissolving 0.80mol of NaOH in 0.50L of 1.0M H3PO4.
Determine compound having greater Ksp or compound having smaller Ksp ? compute [Ag + ] when CuI just start to precipitate. What % of Ag + remains in solution at this point?
The rod initially has a mass of 1460g, and the mole fraction of H2 in the exit gas is 0.223. The mole fraction of H2 in the feed to the reactor is 0.580, and the feed enters at the rate of 6.22kg-mol/hr. What will be the mass of the rod at the end..
a 4.50-g sample of CaO is reacted with 4.34 g of H2O. how many grams of water remains after completion of reaction?
it is found that 1.431g of element x ciontains 7.509 *10^21 atoms. calculate the atomic mass of x
A solution contains 0.10 M Ca2+ and 0.10 M Mg2+. What pH range would result in only Mg(OH)2 precipitating? Ksp for Ca(OH)2 is 6.5 ´ 10-6 and for Mg(OH)2 is 7.1 ´ 10-12.
What is the pH when 100 mL of 0.1 M NH3 is titrated with 50 mL of 0.2 M HCl? pKa of NH4Br is 9.25.
Which of the following is a statement of Hess's Law? Answer a. If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd