Draw an energy profile describing an exothermic reaction and label the energy activation and change of heat components of the profle. Calculate the change in heat when 6.00g of 2Cl2 are used in the reaction. Change of heat= -118.3 kcal/mol.

Here are several sites that offer diagrams.

http://www.google.com/search?q=activitation+energy&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

To draw an energy profile for an exothermic reaction and label the energy activation and change of heat components, follow the steps below:

1. Start by drawing a vertical axis representing energy (E) and a horizontal axis representing the progression of the reaction (usually represented as a reaction coordinate).

2. Label the y-axis as "Energy" and the x-axis as "Reaction Progress."

3. Draw a curved line starting at the reactants' energy level and sloping downwards towards the products' energy level. This curved line represents the energy profile of the exothermic reaction.

4. Label the energy of the reactants as "Initial Energy" and the energy of the products as "Final Energy."

5. Draw a dashed line called the "activation energy" that represents the energy barrier that needs to be overcome for the reaction to proceed.

6. Label the activation energy on the profile.

To calculate the change in heat when 6.00g of 2Cl2 (dichlorine) are used in the reaction:

1. Identify the balanced chemical equation for the reaction involving 2Cl2.

2. Determine the molar mass of 2Cl2. The molar mass of Cl is 35.45 g/mol, so the total molar mass of 2Cl2 is 2 * 35.45 g/mol = 70.90 g/mol.

3. Convert the given mass of 2Cl2 (6.00g) to moles. Use the equation: moles = mass / molar mass. Therefore, moles of 2Cl2 = 6.00g / 70.90 g/mol = 0.0844 mol.

4. Use the given change of heat value (-118.3 kcal/mol) to calculate the change in heat for the given moles of 2Cl2.

Change in heat = moles * change of heat value
Change in heat = 0.0844 mol * (-118.3 kcal/mol) = -9.98 kcal

The change in heat when 6.00g of 2Cl2 are used in the reaction is approximately -9.98 kcal.