Physical Science 2

Question 0

Fractional Distillation

Answer 0

used for purification when components to be seperated have different boiling points

Question 1

Value of delta H for a substance

Answer 1

enthalpy change when one mole of that substance is formed at 1 atm pressure and 25 C from the elements in their stable states at that pressure and temperature

Question 2

What happens to volume when pressure becomes 500atm?

Answer 2

Ideal gas law doesn’t apply and the volume will be somewhat more because of the space occupied by the individual gas molecules

Question 3

when index of refraction is greater…..

Answer 3

light slows down

Question 4

index of refraction

Answer 4

measure of ratio of velocity in air to velocity in medium

Question 5

speed of sound

Answer 5

greater in solid than in air

Question 6

UV light

Answer 6

under 400

Question 7

light

Answer 7

transverse wave with emag fields oscillating at right angles to the propagation vector

Question 8

sound waves

Answer 8

longitudinal pressure wave

Question 9

1 Faraday

Answer 9

1 mol of electric charge

gains 3 electrons? .1 faraday of charge will reduce .1/3 moles of aluminum or .033 moles of aluminum

Question 10

range color change takes place?

Answer 10

depends on point at which HIn is converted to In-, depends on pka

Question 11

potential energy of an oscillatory motion

Answer 11

1/2 kx^2