Chemistry

posted by .

Which of the following is the best definition of Hess' Law?


A. Heat is always released by the decomposition of 1 mole of a compound into its constitute elements.
B. The enthalpy of a process is the difference between the enthalpy of the products and the enthalpy of the reactants.
C. Since enthalpy is a state function, it will be different if a reaction takes place in one step or a series of steps.
D. Heat evolved in a given process can be expressed as the sum of the heats of several processes that, when added, yield the process of interest.
E. At constant pressure the enthalpy change of a reaction is equal to the heat change of a reaction.

  • Chemistry -

    Did you look up on the internet what Hess'Law is? That might help?

  • Chemistry -

    Look up Hess' Law. See if it agrees with Statement D.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Hess' law

    Which of the following is the best definition of Hess' Law?
  2. Chemistry

    Which of the following is the best definition of Hess' Law?
  3. chem expirement!

    You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a …
  4. Chemistry

    Which of the following is the best definition of Hess' Law?
  5. general chemistry

    A sample consisting of 0.025 mol of a solid compound is placed inside a metal cylinder. The cylinder was immersed in a water bath consisting of 10.00 kg of water at an original temperature of 25.00 °C. When the compound decomposes, …
  6. chemistry - decomposition of water(help)

    Hydrogen is a very appealing fuel, in part because burning it produces only non-polluting water. One of the challenges that researchers face in making hydrogen fuel a reality is how to produce hydrogen economically. Researchers are …
  7. chemistry - decomposition of water(help)

    Hydrogen is a very appealing fuel, in part because burning it produces only non-polluting water. One of the challenges that researchers face in making hydrogen fuel a reality is how to produce hydrogen economically. Researchers are …
  8. English

    This is a chemistry lab report, but I was wondering if someone could edit the grammar and look at the sentence structure, etc. I know it's really long and boring, but even if you just look over a bit of it, I would really appreciate …
  9. Chemistry

    Find the enthalpy for : 4Fe + 3O2 = 2Fe2O3 I got the following informations: Fe + 3H2O = Fe(OH)3 + 3/2H2 - Enthalpy is 160.9 kj H2 + 1/2O2 = H2O - Enthalpy is -285.8 kj Fe2O3 + 3H2O = 2Fe(OH)3 - Enthalpy is 288.6 I try using Hess Law …
  10. Chemistry

    The phrase “the heat absorbed or released by a system undergoing a physical or chemical change at constant pressure” is a. the change in enthalpy of the system. b. the change in internal energy of the system. c. the definition …

More Similar Questions