Where the heat from two cooling mugs actually went, walls, air or evaporation, is worked out with a kitchen scale and one equation in SC250's Unit 6 energy transfer lab. Searches like "sc 250 unit 6 assignment example", "sc250 unit 6 sample" and "sc250 unit 6 example" land here.
What a finished SC250 Unit 6 energy transfer lab looks like
About four pages: purpose, prediction, method, data, calculations, discussion. The prediction, fixed before heating, says the covered mug will cool more slowly and lose less mass. Method records 250.0 grams of water per mug, mugs preheated with hot water and emptied, a starting temperature near [80] degrees Celsius, readings every [two] minutes with a kitchen thermometer, and each mug weighed before and after on a kitchen scale with [0.1]-gram resolution. A data table holds both temperature series, bracketed, and a line graph plots them together. The calculation section finds total heat lost from the water as mass times specific heat times temperature drop, then the energy carried off by the water that evaporated, using roughly 2,300 joules per gram, and expresses the second as a share of the first.
How a SC250 Unit 6 example is structured
An energy budget organizes the lab, and the discussion reads it line by line. Heat can leave the water four ways, conduction into the mug and table, convection in the air around it, radiation from warm surfaces, and evaporation, and the report defines each once before assigning any numbers. Only evaporation can be measured directly with a kitchen scale, so the report calculates that share and attributes the remainder to the other three together, saying plainly that it cannot separate them. The comparison between mugs then becomes a test of the saucer's job: if covering the surface cut mass loss sharply and slowed cooling, evaporation was a large part of the budget. Joules, grams and degrees stay attached through every line of arithmetic. Preheating is explained in the method, since a cold mug would absorb heat and distort the early readings.
Four exits defined once
Conduction, convection, radiation and evaporation are each named with an example from the mugs before any calculation, so the budget has labeled lines to fill.
A scale measures one exit
Mass lost from each mug converts to energy through a latent heat of roughly 2,300 joules per gram, the only route kitchen equipment can quantify directly.
The rest grouped honestly
Whatever energy evaporation cannot account for is assigned jointly to the other three routes, and the report admits its equipment cannot split them further.
What the saucer changed
Comparing mass loss and cooling between covered and open mugs shows how much of the budget depended on the open surface, which is what the saucer removes.
Why both mugs were preheated
Warming both mugs first keeps the ceramic from soaking up early heat, and the method says why, so the opening minutes of data can be trusted.
Where marks go in SC250 Unit 6
Energy is where this lab most often goes wrong conceptually: reports that say the water lost its cold, or that heat disappeared, contradict conservation, the principle the budget exists to illustrate. Calculations with the temperature drop in the wrong unit, or specific heat given without its units, cost math credit even when the digits are right. Attributing the whole difference between mugs to insulation, while the scale shows the open mug lost far more water, ignores the lab's central measurement. A prediction written after the curves were plotted shows in its tense and draws a deduction. Graphs carrying two series and no legend lose presentation marks. Skipping the preheating step, or leaving it unreported, makes the early readings hard to interpret, and an uncited latent heat value costs a little.
Get a SC250 Unit 6 example written to your instructions
Say which setup your SC250 Unit 6 lab uses, mugs, a simulation or something else, and attach the handout with its rubric. The free first custom lab report, written within 24-48h to those instructions, lays out the energy budget and every formula with units, leaving temperatures and masses bracketed so only your readings fill them.
SC250 Unit 6 questions, answered
Why weigh the mugs in an energy lab?
Because evaporation removes water, and the mass that leaves carries a known amount of energy with it. Weighing before and after turns an invisible heat loss into a number. Without the scale, the lab can say only that the open mug cooled faster; with it, the report can estimate how much of that difference evaporation explains.
What specific heat and latent heat values should I use?
Use the values your course text gives, and cite them. Water's specific heat is about 4.18 joules per gram per degree Celsius. Its latent heat of vaporization depends on temperature, about 2,260 joules per gram at boiling and somewhat higher at the temperatures in this lab, so a value near 2,300 is reasonable if your text does not specify one.
My covered mug still lost some mass. Did I do something wrong?
Probably not. A saucer does not seal a mug, and some vapor escapes around the rim while some condenses on the underside and drips back. Report the mass loss you measured and discuss where it went. A small loss under a cover is a finding about how well the cover worked, not a failure of the lab.