Team 37

rlau004
Group 37 Group Name : Team 37
Group Members :
Agnes, Alexandrea, Rinittha, Randy, Rui Wen
1.

a) Exothermic. Heat is released by the charcoal.
b) Endothermic. Water absorbs heat from the surroundings, thus, evaporating.
c) Endothermic. Ice absorbs heat from the surroundings, thus, melting
2.

Reactants need to have a higher energy than products, in other words, the bond strength of the products need to be higher ( stronger) than that of the reactants.
3.

Temperature is the measurement of heat, in other words, temperature is just a number showing the direction of heat flow, but heat is a form of energy.
E.g. A thermometer tells you the temperature of an object, making it more tangible to understand . When melting an ice cube, heat is what causes it to melt and its temperature can be measured.
4.

a) It contains 98% isoctane and 2% heptane. (The higher the rating, the lower the knocking)

b)It cannot be determined due to lack of information
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