Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy Curtis M. Franklin Thursday‚ February 14‚ 2013 ABSTRACT An ice calorimetric measurement was used to determine that a reaction involving solid magnesium metal and 1.00M sulfuric acid produces an experimental a value of ∆H = -226 ± 28 kJ/mol at 0°C. This is about 48.4% lower than the expected value reported at 25°C. Introduction Many chemical reactions exhibit themselves by exchanging heat energy‚ either be absorbing
Premium Enthalpy Water Energy
typically bring about rotary motion. The Laws of Motion form the foundation of dynamics. First Law of Motion An object will remain at rest or continue to move at a constant velocity unless acted upon by an external force. F = net force If F = 0 ⇒ v = constant Third Law of Motion For every action there is an equal but opposite reaction. These two forces (action & reaction) act on different bodies. Freaction Faction = − Freaction Faction Second Law of Motion When a net external force acts on
Free Force Classical mechanics
Newton’s Second Law (Predicting Accelerations) Abstract: The purpose of this experiment is to study the Newton’s second law and the behavior of objects for which all forces are not balanced. In this experiment‚ a small mass m will be connected to the dynamics cart by a string. The string will pass over a pulley at the table’s edge so that as the mass falls the cart will be accelerated over the table’s force. The cart will be released from rest and allowed to accelerate over a distance. Using a
Free Newton's laws of motion Classical mechanics Force
has relevance and meaning in the world today. Many people know the term describes the segregation laws that took place in the 1900’s‚ however that much is not the entire story. The term Jim Crow has roots in the deep south‚ and became so popular it was later used as a nickname to describe laws that dehumanized African Americans and striped them of their rights. “Jim Crow” has its roots in the 1830’s when a white minstrel performer‚ Thomas “Daddy” Rice‚ darkened his face with burnt cork and danced
Premium African American Jim Crow laws Black people
Child Labor Laws In The 1800’s Child Labor‚ once known as the practice of employing young children in factories‚ now it’s used as a term for the employment of minors in general‚ especially in work that would interfere with their education or endanger their health. Throughout history and in all cultures children would work in the fields with their parents‚ or in the marketplace and young girls in the home until they were old enough to perform simple tasks. The use of child labor was not a problem
Premium United States Congress Industrial Revolution United States Constitution
Nicholas)Tong)Wei)Jie) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) Nick’s Admin Law " ) 2012-2013 Exam Notes " 0)Page)1)of)20)0) Nicholas)Tong)Wei)Jie) ) GENERAL" ESSAY)WRITING)TIPS) SUMMARY:)Summary)of)what)happened)in)one)sentence)e.g.)_____)applied)for)a)licence)but)did)not)get)it.) REMEDIES:)_______)is)seeking)judicial)review)of))__________’s)decision)to)_________.)) Incorporate)desired)remedies)(certiorari/mandamus/prohibition)) GROUNDS"OF"REVIEW:)Give)a)short)summary)of)your)analysis)e.g.)A)has)3)potential)grounds)for)review
Premium Law
Due Date: March 12‚ 2013 Introduction Hooke’s law states that force is directly proportional to the displacement of the spring that has been stretched or compressed from the equilibrium position. The force that takes place is referred to as a restoring force because it acts on an object to return it to a state of equilibrium. This is Hooke’s Law. It can be shown as: F = -kx In the first formula ---> F is the force of weight k is the spring constant x is the displacement In this
Premium Hertz Mass Force
Name: _____________________________________ Block: _________ Date: _______________ Lab #14: Boyle’s Law Objective: To determine the relationship between the pressure and volume of a gas at constant temperature. Introduction: The relationship of pressure to volume for a gas in a rigid container was first described in 1662 by the Irishborn scientist Sir Robert Boyle (16271691)‚ and is known as Boyle’s Law. As long as the temperature of the gas remains constant‚ the pressure of a gas
Premium Pressure Chemistry Vacuum
“Law of Interaction” Law of Interaction “For every action‚ there is an equal and opposite reaction” The statement means that in every interaction‚ there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. Interaction between the hammer and nail A hammer exerts a force on the nail and drives it into a board . But this is not the only force present for there must also be a force exerted on
Premium Classical mechanics Newton's laws of motion Force
Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy Shannon Wedepohl 9/17/13 Abstract: During this experiment‚ an ice calorimeter was used to measure the change in volume in milliliters of magnesium metal and 1.00 M of sulfuric acid. We found the experimental molar enthalpy of the reaction to be ∆H = -370 ± 1 kJ/mol at 0˚C. This compares with an expected value of -466.9 kJ/mol at 25 ˚C‚ a 20.75% difference. Introduction: Many chemical reactions truly only
Premium Enthalpy Energy Thermodynamics