Question

Assignment Summary

In this assignment, you will write and balance a chemical equation. Then, you will use a table of enthalpy
values to calculate the energy change in the reaction. Next, you will create a model of the energy change
in the reaction. Finally, you will write an explanation that describes the energy change in the reaction.

Answer 1

the direction of a chemical equation is reversed, the arithmetic sign of its ΔH is changed (a process that is endothermic in one direction is exothermic in the opposite direction).

Step-by-step explanation:

the direction of a chemical equation is reversed, the arithmetic sign of its ΔH is changed (a process that is endothermic in one direction is exothermic in the opposite direction).A positive ΔHº value represents an addition of energy from the reaction (and from the surroundings), resulting in an endothermic reaction. A negative value for ΔHº represents a removal of energy from the reaction (and into the surroundings) and so the reaction is exothermic.Every chemical reaction occurs with a concurrent change in energy.

The change in enthalpy equals heat at constant pressure.

Enthalpy changes can be expressed by using thermochemical equations.

Enthalpy changes are measured by using calorimetry.What happens to the value of ∆H for a thermochemical reaction if the reaction is reversed? A. ∆H has the same numerical value, and the sign changes.Every chemical reaction occurs with a concurrent change in energy.

The change in enthalpy equals heat at constant pressure.

Enthalpy changes can be expressed by using thermochemical equations.

Enthalpy changes are measured by using calorimetry.What happens to the value of ∆H for a thermochemical reaction if the reaction is reversed? A. ∆H has the same numerical value, and the sign changes.