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Heat transfer

Density = mass/ volume (D= m/V)

Kelvin = Celsius +273

Heat trans to water = Mw * ΔTw * Cpw (specific heat of water)

• ΔTw = Tf - Ti
• Cp = 4.2 J/goC

Heat transferred to substance A= MA * ΔTA * CpA

Common chemical equations

H2 + O → H2O (hydrogen combines with oxygen to produce water)

CH4 + 2 O2 → CO2 + 2H2O (burning of methane)

2Na + Cl2 → 2NaCl (Sodium combines with Chloride to produce salt)

Ideal Gas Laws

pV = nRT - where P is the pressure, V is the volume of gas, n is the number of moles and R is the gas constant and T is temperature.

n=m/M - where m is the mass and M is the molar mass.

Sample Problems

Below you will find some sample Chemistry problems you may see on one of your exams. If you would like one of our San Diego Tutor educational specialists to go over the answers with you, please send your answers to practiceproblems@sandiegotutor.com and one of our representatives will contact you.

Balance the chemical formulas below

1) _____H2 + _____O2 --> _____H2O

2) _____Cl2 + _____KI --> _____KCl + _____I2

3) _____N2 + _____H2 --> _____NH3

Solve for the unknown

4) Convert 25 degrees Celsius to Kelvin.

5) Given the following sets of values, calculate the unknown quantity.
P = 1.01 atm
V = ?
n = 0.00831 mol
T = 25°C

6) Given the following sets of values, calculate the unknown quantity.

P = ?
V= 0.602 L
n = 0.00801 mol
T = 311 K

7) At what temperature would 2.10 moles of N2 gas have a pressure of 1.25 atm
and in a 25.0 L tank?

Differentiate the following equation

1) f(x) = x3

2) f(x) = (x3 + 5x + 9)

3) f(x) = (x4 + 3x2 + 10x)

4) f(x) = ex + ex Jean Baptiste Biot pioneered early studies of heat conduction. He was born in Paris, France, on April 21, 1774.