Thermo Extra Review

Question 1

is photosynthesis exothermic or endothermic

Answer 1

endothermic

Question 2

is cellular respiration exothermic or endothermic

Answer 2

exothermic

Question 3

is combustion exothermic or endothermic

Answer 3

exothermic

Question 4

what is the equation for photosynthesis including states

Answer 4

6H2O(l) + 6CO2(g) goes —> C6H12O6(s) + 6O2(g)

Question 5

what is the equation for cellular respiration including states

Answer 5

C6H12O6(s) + 6O2(g) —> 6H2O(l) + 6CO2(g)

Question 6

whats the general equation for complete combustion

Answer 6

hydrocarbon + O2(g) —> CO2(g) + H2O(g)

Question 7

whats the biggest difference between a cellular respiration reaction and a complete combustion reaction

Answer 7

the states of water (liquid in cellular respiration, gaseous in combustion)

Question 8

what’s the biggest relationship between photosynthesis and cellular respiration reactions

Answer 8

the reactants for photosynthesis (liquid water and carbon dioxide gas) are the products of cellular respiration in an open system

Question 9

what type of system does cellular respiration and photosynthesis mostly occur in

Answer 9

an open system

Question 10

what are the 2 most common variations to calorimetry calculations regarding the left side of the formula (nH portion)

Answer 10

1. no quantity of any chemical is given so only general H amount is used
2. no mass is given but 2 solutions are mixed so C x V is used (concentration formula)

Question 11

what are the 5 most common variations to calorimetry calculations regarding the right side of the formula (mcdeltat portion)

Answer 11

1. when two solutions are mixed
2. when a bomb calorimeter is used
3. when the calorimeter has a quantity of water as well as a mess of the metal calorimeter
4. water and an uninsulated calorimeter with a heat capacity given in the results
5. a calorimeter describing a quantity of water, a mess of meta container and a thermometer with a heat capacity