Use Hess's Law and the following information to calculate the change in enthalpy for the reaction 2C + H2 -> C2H2? How do you use Hess's law to find the enthalpy of reaction for these …

Explanation: We want to calculate #DeltaH_f^@# for hexanes...the which by definition, is the enthalpy change when one mole of stuff is formed from its constituent elements in their …

So you want the enthalpy of combustion of ethane? I make it #DeltaH_"combustion"^@=-1569.5*kJ*mol^-1#

What is a spontaneous reaction? Are enthalpy and entropy affected by temperature? How would you define the concept of equilibrium in terms of free energy and entropy? What is entropy? …

How do you calculate the energy change of reaction for the following reaction? When electricity is produced from coal, the chemical energy in coal is first changed to what type of energy? This …

6 ml of an ideal gas is at a temperature of 250 K. What temperature is required to produce a volume of 9 ml at constant pressure ? Where does reduction occur in a galvanic cell? What is …

What is the activation energy for the reverse reaction in terms of the activation energy of the forward reaction and the enthalpy of reaction? Draw it out for an endothermic reaction.

Using the data given, the heat of combustion would be 308 kJ/mol. To calculate the heat of combustion, you must determine the amount of heat energy released and divide by the …

How do we quantify the strength of ionic bonding? How do you write the total ionic equation and net ionic equation for the reaction of silver nitrate and potassium chloride? How do you use the …

The particle p is released from rest at the top of a smooth plane inclined at angle a where sina=16/65.the distance travelled by P from top to bottom is S metres and speed of P at …