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Chemistry

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Joe Oberbrunner

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Cards in this guide (13)
What is thermodynamics

the study of the movement of energy and heat.

or

Thermodynamics is the branch of physics concerned with the conversion of different energy forms.

•DeltaG (rxn) = DeltaG (pdts) - DeltaDG (rcts) •DeltaG°(rxn) = -R T ln K •

What is the mass defect

If you add the exact mass of the protons, neutrons, and electrons in an atom you do not get the exact atomic mass of the isotope. The diference is called the mass defect. The difference between the mass of the atomic nucleus and the sum of the masses of the particles within the nucleus is known as the mass defect.

How much energy does it take to melt a 16.87 g ice cube

636 J

Which quantum number deals with shape

The second quantum number, or "l" which describes the subshell (s, p, d, f, etc).

What does a negative H tell about a reaction

The reaction is exothermic.

Which of the following would be a good situation in which to apply Hess's law

Scale step reactions so products/reactants that don't appear in the target reaction will cancel out.

What information does Gibbs free energy give about a reaction

It tells if the reaction will process spontaneously or not

What does binding energy measure

The energy used to hold the nucleus together

What best describes a radioisotope

its nucleus is unstable

Which of the following describes a spectrum apex

A range of wavelenghs of frequencies of electromagnetic raditation

What statement best describes the potential energy diagram of an endothermic reaction

The potential energy of the products is greater than the potential energy of the reactants.

What is the wavelength of a light of frequency 4.47 X 1014 Hz

The wavelength is 671 nm.

How much energy is released is a sample loses 0.05 kg mass through radioactive decay

4.5 × 1015 J

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