Evaluate the change in enthalpy of the reaction

Reference no: EM13486960

In a coffee-cup calorimeter, 1 mol KOH and 1 mol HBr initially at 23.5 oC (Celsius) are mixed in 100g of water to yield the following reaction: KOH + HBr ? K+(aq) + Br-(aq) + H2O(l) After mixing the temperature rises to 78.2 oC. Calculate the change in enthalpy of this reaction. Specific heat of the solution = 4.184 J/(g oC) State your answer in kJ with 3 significant figures. Don't forget to enter the unit behind the numerical answer. The molecular weight of KOH is 56.2 g/mol, and the molecular weight of HBr is 80.9 g/mol.

Reference no: EM13486960

Questions Cloud

Determine maximum speed of the oscillating mass : A 0.80 kg mass is attached to a light spring with a force constant of 23.9 N/m and set into oscillation on a horizontal frictionless surface. determine maximum speed of the oscillating mass

How to calculate the heat lost or gained by the system : There is an increase in temperature of 56 K. Calculate the heat lost or gained by the system in response to this change in the external temperature. Express your answer in J. Heat capacity for Helium = 20.8 J/(mol K) Molecular weight for Helium = ..

What is the asteroids orbital period : An asteroid is discovered in a nearly circular orbit around the Sun, What is the asteroid\'s orbital period, its \"year,\" in terms of Earth years

Would the proposal create a second class of stock : Would the proposal create a second class of stock and terminate Bushong's election and each distribution must be in an amount sufficient to enable shareholders to pay their state and Federal resulting income taxes on the pass-through.

Evaluate the change in enthalpy of the reaction : Calculate the change in enthalpy of this reaction. Specific heat of the solution = 4.184 J/(g oC) State your answer in kJ with 3 significant figures. Don't forget to enter the unit behind the numerical answer. The molecular weight of KOH is 56.2 g..

Explain the temperature of the calorimeter increases : The temperature of the calorimeter increases by 82.9oC (Celsius). Given that the energy of combustion (?E) for lauric is -37.1 kJ/g, calculate the heat capacity of the bomb calorimeter. Make sure you enter kJ/C for your unit behind the number.

What is the frequency in hertz of the sound wave : On a hot summer day (30 degrees Celsius), a pesky little mosquito produced its warning sound near your ear. What is the frequency in Hertz of the sound wave

Prepare income statements with one column for 2008 : Prepare income statements with one column for 2008, one column for 2009, and one column for the two years together, using (a) variable costing and (b) absorption costing and what inventory costs would be carried in the balance sheet on December 31,..

Determine the radial acceleration of a point on its rim : A uniform disk of mass M = 1.6 kg and radius R = 0.18 m rotates counterclockwise at a constant rate of 36 rev/s about its central axis. Determine the radial acceleration of a point on its rim

User Account

All Pages