Chemistry

Expressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. FILL IN THE BLANKS PLEASE.

The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J

J cal kJ
695 ___ ___



___ 132 ___



___ ___ 0.478

  1. 👍 0
  2. 👎 0
  3. 👁 1,325
  1. 1 cal = 4.184 J
    1000 J = 1 kJ.

    The way you do these is to make the units convert from what you have to what you want. I wrote the factors above. Here is how you do the first one. I'll leave the others for you.

    The factor for calories to J is one of these two; i.e., 1 cal/4.184 J OR 4.184 J/1 cal. You want to convert 695 cal to J.
    695 cal x factor = ? J and you must plug in the factor. It MUST be one of the two above. Let's try one factor, then the other.
    695 cal x (1 cal/4.184 J) = ? and
    695 cal x (4.184 J/1 cal) = ?
    ONE of those MUST be right. Which one. Take them 1 at a time. Only look at the units.
    The first one is cal x cal/J which gives (cal^2/J). You were looking for J. Right? So this one can't be right. Look at the second.
    Again, look only at the units.
    The second one is cal x J/cal. Notice that cal cancels and J doesn't so that's the one to use because you want J. Therefore,
    695 cal x (4.184 J/cal) = ? J and that just leaves the calculation. If you want to put that into a formula, it is this.
    (#+unit you have) x (unit you want/unit you have) = #+unit you want to convert to.
    I'll be glad to check your work on the others.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science (energy)

    1. What similarities do nuclear energy and chemical energy share? Choose all that apply. A. Both are types of kinetic energy. B. Both are types of potential energy. [CORRECT!] C. Both involve magnetic energy. D. Both involve

  2. Science

    PLEASE CHECK MY ANSWERS------------------------------------------------- An object falls through the air, gaining speed as it falls. A student claims that this creates new energy, and so it breaks the law of conservation of

  3. science(check answers)

    can someone check my answer thanks ! 2.The ability to do work or cause change is called A.velocity. B.energy.(I PICK B.) C.transfer. D.friction. 3.Which type of energy is demonstrated by a person jogging? A.electrical energy

  4. SCIENCE

    When you turn on a television, you transform electrical energy into what types of energy? 1) heat energy 2) light energy 3) elastic potential energy 4) sound energy I THINK #1 ,#2 #4 Thanks for your help.

  1. Science 6

    When you turn on a battery powered flashlight, you transform... A:heat energy into light and chemical energy. B:chemical energy into electrical energy and light. C:heat energy into chemical energy and light. D:eletrical energy and

  2. Chemistry

    compared to an ordinary chemical reaction, a fission reaction will 1 release smaller amounts of energy 2 release larger amounts of energy 3 absorb smaller amounts of energy 4 absorb larger amounts of energy is it 2 ?

  3. science

    1.what similarities do nuclear energy and chemical energy share?pick all that apply A.both are types of kinetic energy. B.both are types of potential energy C.both involve magnetic energy D.both involve stored energy (I PICK B AND

  4. Chemistry

    The energies, E, for the first few states of an unknown element are shown here in arbitrary units. n 1 E -11 n 2 E -5 n 3 E -2 n 4 E -1 n ... E ... n infinite E 0 A gaseous sample of this element is bombarded by photons of various

  1. Science

    We know that the law of conservation of energy states that energy can not be created or destroyed. It only changes form. Consider this energy transformation diagram. Assume that the energy input in this case is chemical potential

  2. Science

    1. Which energy is primarily responsible for phenomena such as the movement of large plates and volcanoes? (1 point) a. magnetic energy b. mechanical energy c. electrical energy d. thermal energy By the way, I am in Connexus, and

  3. Physics

    please check: Which of the following energy forms is associated with an object in motion? a. potential energy b. elastic potential energy c. nonmechanical energy d. kinetic energy i think its B Which of the following energy forms

  4. Science

    How are temperature and thermal energy related A) Temperature and thermal energy both measure the total kinetic energy in an object. B) Temperature is one factor that determines the thermal energy of an object C) Thermal energy is

You can view more similar questions or ask a new question.