Question

Determine if the statement given is true or false. If it is false, change the underlined word(s) so that the statement reads true. ___ Within a closed system, the amount of energy is variable over time. ___ A fire creates energy. ___ The second law of thermodynamics is concerned with entropy. ___ Photosynthesis and similar reactions decrease entropy. ___ Eventually, all molecules in the universe will become randomly dispersed. ___ Reactions that release energy are endergonic. ___ Enzymes increase the activation energy needed for chemical reactions to occur. ___ ATP contains a six-carbon sugar. ___ Conversion of ATP to ADP releases energy. ___ The "downhill" reaction of coupled reactions in living cells releases less energy than the "uphill" reaction requires.

Answer 1

14. False amount of energy in a closed system is constant

15. True- heat energy is produced and helps fire to spread.

16. True- entropy is the degree of disorder of a system. Because heat flow from hotter to cooler areas and not in reverse.

17. True- photosynthesis takes up large amount of reactants and gives an organised less amount of products.

18. True- universe is expanding and cannot reach equilibrium

19. False- endergonic reaction requires energy

20. False- enzymes increases reaction rate by lowering the activation energy

21. False- ATP contains pentose sugar ribose.

22. True- hydrolysis of ATP produce free energy

23. True- uphill reactions are energy requiring and down hill reactions are energy releasing reactions.