ChemistryWiki | RecentChanges | Preferences
Difference (from revision 13 to current revision)
(minor diff, author diff)
(The revisions are identical or unavailable.)
Answer the following problems showing all work. (There are no final or initial temperature calculations)
1. The Principal was driving the school golf cart 4.57km/hr. If the Principal rode 5.02E9 cm. how long did it take in days?
2. A 1.73 kg sample of a substance gains 26.3 kcals of energy. If specific heat capacity is 0.731 cal/(g °C), what is the change of temperature, (ΔT) . Please include the sign even if it is a positive number of degrees.
3. A container of water was given 3.75KJ of energy and its temperature raise from 54.6°C to 101.4°C. How many grams of water are you heating?
4. How many kcals of energy was absorbed by 315g of a substance if the temperature raised from 37.1° C to 64.3°C. The specific heat capacity of the substance is 0.803 cal/(g°C)?
5. What is the specific heat capacity of a substance if the 71.6g of substance absorbs 2.17 kJ of energy while the temperature went from 18.1°C to 47.2° C?
Answers: 1) 458days, 2) +20.8°C, 3) 19.2g , 4) 6.88kcal , 5) 1.04cal/(g°C)