Abstract
This paper is a write-up of two experiments in chemistry. The first is a write-up of an experiment in calorimetry, looking at the heat of fusion of ice. The second is an experiment on the specific heat of metals, looking at the specific heats of copper and tin. The experimental details are described.

From the Paper
"The first experiment looks at the heat of fusion of ice -- the amount of heat needed to convert a solid into a liquid at constant temperature and pressure is the heat of fusion of the substance. The molar heat of fusion is the amount of heat energy required to completely change one mole of solid into one mole of liquid at its melting point. In this experiment the molar heat of fusion of...."

Tags:calorimetry, heat of fusion, specific heat

Abstract
This paper documents a lab study of the exercise's effect on blood pressure and heart rate, and how graded exercise testing (GXT) can be used to measure a person's aerobic capacity and VO2 max. The paper explains a person's VO2 max is considered the most accurate measurement of the cardiovascular system, and that during the GXT, changes in the heart rate, blood pressure, serial ECG, breathing, and exertion can be monitored. All of these variables, the paper continues, can indicate what a person's aerobic capacity is, along with whether that person has a myocardial dysfunction. The paper points out that the ability to observe and measure these variables is considered very important because lacking budgets may prevent access to a metabolic calorimetry circuit. The paper's hypothesis proved correct, as subjects showed an increase in heart rate and systolic pressure during exercise, while diastolic pressure remained fairly constant concluded to be valid. This paper includes illustrative figures and data tables.

Outline:
Introduction
Procedures
Results
Conclusion
Questions
References

From the Paper
"Under normal conditions, systolic pressure will increase with exercise. However, the systolic pressure should never exceed 250 mm Hg. A large increase in diastolic pressure is not normal. Diastolic pressure should never exceed 115 mm Hg during intense exercise. Diastolic blood pressure has little variability with exercise. Failure of heart rate to increases during intense exercise is also an abnormal response to exercise. An individual's heart rate should also not decrease by more than 12 beats per minute within the first minute of exercise (lab manual, Durstine). Heart rate and blood pressure are measured for many various reasons. It is very important especially to measure heart rate and blood pressure during exercise to make sure the person is responding normally. When the maximum heart rate is exceeded, the individual may experience exhaustion and lactic acid build up. Also the body will stop burning fat (Misner, 2006). Hypertension, or high blood pressure, puts an individual at risk for coronary artery disease. Every 10-20 mm Hg starting at 115/75 mm Hg doubles the risk of cardiovascular disease. A normal blood pressure would be about 120/80 mm Hg. The pre-hypertension categories would range from 120-130/80-89 mm Hg. Stage one of hypertension would range from 140-159/90-99 mm Hg. Stage two of hypertension would include blood pressure over 160/100 mm Hg (lab manual, Durstine)."

Tags:YMCA, and, Bruce, Protocols, heart, rate, blood, pressure, measurements

Abstract
This is a technical report on a laboratory experiment determining heating value of fuels. Test sample is naphthalene, and the calibrating substance is benzoic acid. The oxygen bomb calorimeter used is the Parr type.

From the Paper
"The experiment aims to determine the heat of combustion of naphthalene using data obtained from the Parr bomb calorimeter.
Three 1-g portions of naphthalene were weighed using the analytical balance. Benzoic acid is the calibrating substance used for the experiment. The heat capacity Csys of the system is calculated using the theoretical value of benzoic acid and the nickel fuse wire. This Csys is equivalent to the heat capacity Ccal of the calorimeter; this value will be used in determining the heat of combustion of naphthalene.
The heat of combustion of naphthalene is accepted at
?5156.95 KJ/mol. The experimental value ?3787.445097 KJ/mol has an error of 26.56%."

Tags:calorimetry, benzoic, acid