Essay about Lab Report Caloric Content of Food

The concept of energy intake and expenditure refers to the amount of calories per day that an individual consumes, and is the chemical energy in foods which can be metabolized to produce energy available to the body. As stated before energy is obtained from the foods we eat and is used to support an individual’s Basal Metabolic Rate, energy is measured in calories or joules as both units are very small they are multiplied by 1,000 and referred to as kilocalories. Different foods provide us with different amounts of energy, and the potential fuel sources available to exercising muscles are fats – 1 gram fat =9.0kcal = 23kJ,

With that, Charley left the office. Rhonda looked over the list. “Guess I’ll have to brush up on my biochemistry. No problem. I’m interested in knowing if my running would be improved by drinking this stuff.” Rhonda recalled that a food’s calorie content was the simplest reflection of its energy content.

Nutrition, I have learned plays a big part in our life. To be honest I was clueless about how much nutrition affected our everyday lives. I love going to the gym working out, now that I know what should go into my diet I think I will see a lot more improvement. I occasionally follow the latest diet fads because I believed it would be better for my health, but in turn it really hurt more than it helped! This Diet Analysis project has been extremely useful course because I can personally relate to it and can use much of the information learned to my daily routines. The Diet Analysis project was a real eye opener because it let me see what exactly I was putting into my diet.

Calorimetry is the science of measuring the change in heat absorbed or released during a chemical reaction. The change in heat can tell us if the reaction is either exothermic - it released or heat into surroundings, or endothermic - it absorbed heat from surroundings. The device used to measure calorimetry is a calorimeter. A calorimeter can range from very expensive lab ones to coffee styrofoam cups but they are all tightly sealed in order to prevent heat from escaping.

If the difference between the recorded times are more than 10%, add a third trial. Repeat these steps with each size beaker. Calculate the average time for each beaker and record the data. The next step of the lab exercise is determining the exact volume of the beakers used in the burn time experiment. Fill a beaker to the top with water. Carefully pour the water from the beaker into a graduated cylinder. Reading the meniscus, record the exact volume into a data sheet. Repeat this step with each size beaker until all volumes are recorded into the data sheet. The final process of the Graphing and Estimating lab is plotting the recorded data onto a graph. Using the data recorded for burn time, in seconds, place the data on the vertical axis. Use the horizontal axis for the volume in milliliters. With the data points plotted determine whether a straight line or a simple curve will best represent the data. Now, obtain a jar and determine the volume. Fill the jar to the top with water. Carefully pour the water into a graduated cylinder. Precisely record the data. Using the plotted data on the graph and the simple curve or straight line to predict how long it would take for the flame to burn out on the candle if it was covered with the jar that was just measured.

In my Diet Journal, I recorded all the food I ate over the weekend with the best accuracy I could attempt to do. But one of the factors that made my food diary inaccurate was that I couldn’t find every detail and percentage of fat, carbohydrates, and proteins in everything I ate. Also, all of the amounts and servings were approximations, not exact amounts. I was able to record everything I ate, but accuracy may have been affected by estimations and sources. The calorie intake I had over the three day period ranged from 1900-2500 calories. This was over my 1800 BMR, due to the food choices and fluctuation in diet.

will open in the Calorimetry laboratory with a calorimeter on the lab bench and a sample of

I watt-I joule/sec. most useful kinds of energy=chemical and potential. One calor is the enrgy it takes to raise one kg of water by one degree Celsius. 4k joules=calories. Solar cells- crystals that convert sunlight directly into electricity. K energy depends on sq of v. double speed=kinetic energy increased by factor of 4.. temp is a measure of hidden kinetic energy.

Table 1 Concentration of protein, DNA, and ratio of the two in heart, kidney and liver of bos taurus. Average standard deviation of protein concentration is also shown.

Use your results in Data Tables 1 and 2 and the information provided in the Background section to calculate the amount of heat produced per gram (in Calories/gram) for each food and record this value for each food type.

Aim: To plan, conduct, evaluate and report on an investigation of chemical changes, and make recommendations for their use as an energy source in Heat-and-Eat meal packs.

Purpose The purpose of this experiment was to identify which tree nut of the 4 that were tested (hazelnuts, walnuts, pecans, and almonds) had the highest energy content. Hypothesis If different tree nuts are tested for their energy content then the tree nuts with the highest amount of oil on its exterior (shell) will have the greater energy content, this is because the tree nuts with the greater oil content will catch fire at a quicker pace than the tree nuts with a smaller oil amount on their outer shell. Background information Calorimetry is how you measure the amount of heat that is let off during a chemical reaction.

There are many types of calorimeter that can be used to measure the amount of heat energy

The equation to figure it out is Y = 44.076 X + 471.752 Y being energy in kilojoules and X being fat in grams so the equation being (Energy) = 44.076 * (Fat in grams) + 471.752.

A small calorie(symbol:cal) - 1cal is the amount of energy to required to raise one gram of water by one degree Celcius.