A certain reaction has an enthalpy of -75kJ and an Ea of 40kJ. A catalyst lowers the activation energy of the forward reaction by 15kJ. What is the Ea of the reverse reaction with the same catalyst?

Ea=40kJCatalyst(-15)= 25kJReverse reaction(+75)=100kJ More test answers on https://studyhippo.com/kinetics-blahh-8705/

the label on a cereal box indicates that one serving (with skim milk) provides 250Cal. what is this energy in kJ?

250Cal X (1000cal/1Cal) X (4.184J/1cal) X (1kJ/1000J) = 1.0 X 103kJ More test answers on https://studyhippo.com/chapter-5-notes-7867/

The potential energy is almost always a function of coordinates. What is the V expression?

V = V(x) for 1D For 3D V = V(x,y,z) More test answers on https://studyhippo.com/physical-chemistry-3-schrodinger-equation/

What is the difference between an energy calorie and a dietary calorie?

A dietary calorie is equal to 1,000 energy calories. More test answers on https://studyhippo.com/principles-of-chemistry-iii-nutrition-and-metabolism-47079/

What is the effect of a catalyst on the required energy to achieve effective collisions?

Catalyst lowers the energy needed for an effective collision. (Activation energy) More test answers on https://studyhippo.com/chem-quiztest/

What is the fate of the energy in visible light that is incident upon glass

Visible light will be transmitted by the glass, losing little energy, so energy remains visible light energy More test answers on https://studyhippo.com/physics-chapter-26-33533/

What is the reason we can only have a certain number of electrons in an energy level?

The repulsion between negative electrons. More test answers on https://studyhippo.com/chapter-2-11845/

What is the relationship between wavelength of light and the quantity of energy per photon?

They are inversely related More test answers on https://studyhippo.com/chapter-10-photosynthesis-study-guide/

What is the trend in the U.S. of energy consumption between the mid-70s and the mid-90s?

We kept using more and more, even after the peak of the discovery More test answers on https://studyhippo.com/geology-105-test-3-ole-miss/

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Energy Flashcards, test questions and answers

Discover flashcards, test exam answers, and assignments to help you learn more about Energy and other subjects. Don’t miss the chance to use them for more effective college education. Use our database of questions and answers on Energy and get quick solutions for your test.

What is Energy?

for meEnergy is a term used to describe the capacity of a physical system to do work. It is an important concept in many areas of science, from physics and engineering to ecology and economics. Energy exists in various forms, such as thermal energy, electrical energy, chemical energy, nuclear energy, gravitational energy and kinetic energy. All these forms of energy can be converted into one another with varying levels of efficiency.Thermal energy is the transfer of heat between two objects or bodies at different temperatures. Thermal radiation is another form of thermal energy which is emitted by hot objects as infrared radiation. Electrical energy is produced when electrons flow through a conductor such as a wire or battery. Chemical reactions can also produce electrical currents when certain substances are combined together or react with one another. Nuclear power plants use nuclear fission reactions to generate electricity while solar panels convert light from the sun into electricity via photovoltaic cells. Gravitational potential energy (GPE) is the potential for stored kinetic or mechanical work that can be released under certain conditions due to the force of gravity acting upon it; an example would be water stored behind a dam before being released downriver for use in hydroelectric power generation systems. Kinetic energy (KE) refers to an object’s ability to do work due to its motion; this could include anything from wind turbines harnessing wind power for electricity production or a baseball flying through the air after being thrown by hand towards its target on a playing field. The most important part about understanding how each type of Energy works and interacts with each other lies in understanding how they are converted into one another so they can be used efficiently in our lives today.