Thermodynamics

Use thermodynamic data to calculate the standard enthalpy of decomposition of liquid hydrogen peroxide into water and oxygen gas: H2O2(l)-->H2O(g) + 1/2 O2(g). Calculate the energy released by the decomposition of 1.0 g of 90% hydrogen peroxide solution. Molar mass of hydrogen peroxide = 34.0 g/mol. Estimate the final temperatur ...continues

Equilibrium Constants

The equilibrium dissociation constant, K(subscript p), of the reaction H2-->2H/H2<--2H is 3.6 x 10^-33 atm. 1.00 mol of H2 is injected into a 10.5-L oven at 600 K and allowed to reach equilibrium. Calculate the total number of free hydrogen atoms in the reaction system.

Problem Set

Please see the attached file for full problem description. --- 10. The figure below shows a somewhat condensed structural formula for acetaminophen, the active ingredient in Tylenol. CH CONH --- (a pentagon) ---- OH 3 a. Write the complex structural formula for acetaminophen, showing all atoms and all bonds. b. ...continues

how many cal of heat will be released?

If 75 grams of steam at +140C is cooled to the point that it becomes ice at -5C, how many calories of heat will be released? (*The specific heats of steam and ice are both 0.5 cal/gC.) please show how you got it thanks

Molecular weight and mole concept

7.15 The supply of uranium in the United States (and the rest of the world) is large, but not limitless. By failing to reprocess spend nuclear fuel, we are discarding a potential source of energy that some European countries are presently tapping. Is the current American practice justified? Why is it different from the Europe ...continues

Specific Heat

When 110.0g of gasoline undergoes comustion, 9580 kJ of energy are released. Express the heat in kilocalories. (Note: 4.184J=1cal)

Specific Heat

How much heat is released when 250.0g of copper is cooled from 100.0ºC to 20.5º? The specific heat of copper is 0.0921 cal/gºC.

Specific Heat

A 73.6g sample of aluminum is heated to 95.0ºC and dropped into 100.0 g of water at 20.0ºC. If the resulting temperature of the water is 30.0ºC, what is the specific heat of the metal?

Conservation of Energy

A sample of water weighing 125g releases 10.0 kcal of heat as it cools from 80.5º to 0ºC. It then releases another 10.0 kcal of heat as it freezes at this temperature. How many kcal of heat are needed in order to convert 125g of ice at 0º to water at 80.5ºC?

What goes where in the calculation

I'm doing boiling point elevation and the formula (I don't know how to use the Equation Editor so I will type it out the best way that I can: delta T sub-script b is equal to k sub-script b times m times i. (k sub-script b is equal to 0.52 degrees C/m for water) I don't know how to use this calculation with this problem: Calcul ...continues