chapter 5 Flashcards
1
Q
what is endothermic reaction?
A
absorbs heat from surroundings
feels cold
2
Q
what is an exothermic reaction?
A
transfers heat to the surroundings
feels hot
3
Q
How to you find change in H?
A
H final-H initial
H products-H reactants
4
Q
when H is positive?
A
the system gain heat from the surroundings
endothermic
5
Q
When H is negative?
A
the surroundings gain heat from the system
exothermic
6
Q
what is specific heat formula ?
A
Sp heat = Q/m(delta)T
7
Q
fats =
A
9 Cal/g
38KJ/g
8
Q
carb =
A
4 Cal/g
17 Kj/g
9
Q
protein =
A
4 Cal/g
17 KJ/g
10
Q
the highest fuel value is obtained from?
hydrogen
charcoal
natural gas
wood
bituminous coal
A
HYDROGEN
11
Q
which is not considered a fossil fuel?
natural gas
anthracite coal
hydrogen
petroleum
crude oil
A
HYDROGEN
12
Q
what is the most abundant fossil fuel
A
coal
