Question

is the heat of formation of MgO (s) endothermic or exothermi

3. (8) Consider the following: Temperature: Beaker A contains water starting at 25 °C, which is then heated to 60 °C, and is cooled to 15 °C. Beaker B contains water beginning at 25 °C, which is immediately cooled to 15 C. What is the total change in temperature between the initial and final state for each beaker? Beaker B: AT Beaker A: AT Distance: Book A is moved from a table to the floor. a distance of 3 feet. Book B is moved from the table onto a book shelf 4 feet above the table, and is then dropped to the floor. What is the total distance traveled by each book between the initial and final state? Book B: d Book A: d Which is the state function, temperature or distance? Explain:

Answer 1

3 . Beaker A Initial temp. - 250 final temp = 15°c DT & Change in temp.) = 25-15-10°c Beaker B Initial temp. = 25c final temp. = 156. DT- 25-15= 10°c. Distance BookA. Distance for 'Book A = 3 feet Table Brut 1 TT floor BooKB. Distance for Book B = - 4+4+3 11 feet. floor Temperature is state function as it only depends on the initial and final state, and does not depends on path followed , but Distance is path function, as it depends on path followed B. Deoxyribo Nucleotide phosphercup. Nitrogenous base Ribose sugar Ho-p-o phosphate group t o Nitrogenous (base lon Ribose Sugar 14. Base - Adenine. 15 I carbon on which base is attached to sugar 3 Carbon- Hydroxy group 5 carbon- phosphate group. 116 A-T 5 ACTG GC TTTACACTGGIAA G-C. 3 TGACC GAATGTG ACGATT 5'