Chem/Phys

Question 1

What are the hydrostatic and pressure formulas?

Answer 1

P = F / A P = P₀ + pgh (pressure exerted on object in water) P is the hydrostatic pressure P₀ is the air pressure at surface (usually 1 atm)

Question 2

What is isothermal? how is energy transfer formula altered?

Answer 2

No temperature change Q=W This is because temperature is related to ΔU is related to internal energy change which influences temperature

Question 3

What is isobaric? what formula is used?

Answer 3

No pressure change. No specific change to formula

Question 4

What is isovolumetric, what formula is used?

Answer 4

No volume change, ΔU = Q

Question 5

What is adiabatic in a system? what formula is used?

Answer 5

No heat in or out ΔU = -W

Question 6

Buoyancy formula?

Answer 6

Fb = pVg

Question 7

Finding Work given a force and distance of object travelled along with angle

Answer 7

W = Fd cosø

Question 8

Power formula? what unit is it in?

Answer 8

Work / time = Nm / s = J / s = Watt

Question 9

VAT VAX TAX distance

Answer 9

v = v₀ + at v² = v₀² + 2ax x = v₀t + at² / 2 d = vt

Question 10

Force formula for tension with a double pulley?

Answer 10

F net = 2T - mg Can adjust to (F - mg) / 2 = T

Question 11

Acet means what?

Answer 11

2 carbons attached to carbonyl oxygen

Question 12

Mechanical energy formula

Answer 12

E = U + K E = mgh + 1/2mv² Mechanical energy in joules is equal to Potential energy + Kinetic energy

Question 13

Work energy-theorem

Answer 13

Wnet = ΔK = Kf - Ki The total work in joules is equal to the change in kinetic energy or speed of something so take the final speed and subtract it from the initial

Question 14

Work done by nonconservative forces formula?

Answer 14

W nonconservative = ΔE = ΔU + ΔK

Question 15

Conservation of mechanical energy formula? What are conservational forces?

Answer 15

ΔE = ΔU + ΔK = 0 Gravitational, electrostatic, elastic The change in mechanical energy is equal to 0 if the only forces effecting it are gravity or electrostatics or elastic

Question 16

What are some unconservative forces in work?

Answer 16

friction air resistance drag

Question 17

What is the second law of thermodynamics

Answer 17

In any cyclic process the entropy will either increase or remain the same.

Question 18

What happens when a alkene is treated with Br2?

Answer 18

backside attack, anti configurations for both bromides

Question 19

A diverging lense is (concave/convex) and has a (+/-) focal point?

Answer 19

A diverging lens is concave and has a negative focal point

Question 20

What is the doppler effect equation?

Answer 20

f’ = f [(v ± v_D) / (v ∓ v_s)]

Top sign for Toward

f’ = perceived frequency

f = actual emmited frequency

v = speed of sound in medium

v_D = speed of detector

v_S = speed of sound source

Question 21

high K_sp = ? solubility

Answer 21

high

Question 22

What is a colloidal solution?

Answer 22

A solution that has aggregation (mixture of two phases) of particles

Question 23

The two solutions in Extractions need to be ______ ?

Answer 23

immiscible

Question 24

How would you extract an acid from solution?

Answer 24

By adding a base

A base will remove the H+ making the acid more polar and will be more soluble into the aqueous phase

Question 25

Extraction follows the solubility rule that …?

Answer 25

likes dissolve likes

Question 26

Carboxylase uses what?

Answer 26

CO2

Question 27

What is a good sign of a nucleophiles?

Answer 27

”-“ / lone pair

”-“ sign or lone pair on a C,N,O,H, or even pi bonds

Question 28

Nucleophiles are determined by what four factors?

Answer 28

ChESS

Charge

Electronegativity (less EN is better)

Steric Hinderence (smaller, better)

Solvent (not protic)

Question 29

What charge will a good electrophile have?

Answer 29

Positive

Question 30

What is another name for oxidant?

Answer 30

oxidizing agent

Question 31

What is the difference between pKa and a Ka?

Answer 31

Ka the concentration of hydrogen and the pKa is the -log of the Ka

Question 32

How to find pH, given Ka?

Answer 32

pKa=-log(ka)

Hendersen Hasslbach equation

pH = pKa + log [A-]/[HA]