- 18a) Crtate Charler law. vtater that the volume of a given mar of a gak is directly proportional to its abrolute temperature at a constant prossure. b The volume of a sample of ndrogen gas at a tomperatu of agik and 1.0 times 10^5 Parale was 3.5 times 10^-2 mathrm(~m)^3 . Calculato the temperature at which the volume of legan would be 2.5 times 10^-2 mathrm(~m)^3 at 1.0 times 105 Pascaln
- Change the word lin brackets using the rules of wordformation and fill in gap. These components would immediately separate because of different square (dense) Bonpoc 9 P OTMeTHTE Bonpoc Change the word lin brackets using the rules of wordformation and fill in gap. Some square think that we are close to a physical limit in increasing computer operation speed (to research)
- 3. A ... in thermodynamics refers to that part of universe in which observations are made. a) Universe b) System c) Surrounding d) Boundary 4. Distinguish between endothermic and exothermic processes . If we know that a reaction is endothermic in one direction, what can be said about the reaction in the reverse direction? 5. Given: 2H_(2)(g)+O_(2)(g)arrow 2H_(2)O(c) Delta H=-571.6kJ/mol C_(3)H_(4)(g)+4O_(2)(g)arrow 3CO_(2)(g)+2H_(2)O(l) Delta H=-1937kJ/mol C_(3)H_(8)(g)+5O_(2)(g)arrow 3CO_(2)(g)+4H_(2)O(l) Delta H=-2220kJ/mol Determine the heat of the hydrogenation reaction C_(3)H_(4)(g)+2H_(2)(g)arrow C_(3)H_(8)(g) 6. Two solutions (the system), each of 25.0 mL volume and at 25.0^circ C are mixed in a beaker. A reaction occurs between them , causing the temperature to drop to 20.0^circ C After the products have equilibrated with the surroundings, the temperature is again 25.0^circ C and the total volume is 50.0 mL. No gases are involved in the reaction. Which one of the following relationships concerning the change from initial to final states (both at 25.0^circ C is correct? a. Delta E=0 b. Delta H=0 C. Delta Elt 0 d. w=0 e. q=0 7. Consider the reaction A -> products. Which of the following plots is consistent with a zero-order reaction? a. [A] plotted against time gives a horizontal straight line. b. In [A] plotted against time gives a straight line of negative slope. C. 1/[A] plotted against time gives a straight line of positive slope. d. [A] plotted against time gives a straight line of negative slope. e. [A] plotted against time gives a curved line of negative slope decreasing in magnitude as time increases.
- Fill in gaps. 2 words are extra Photons, the basic units of light square , can in theory be much better than square for moving signals through a square First of all, photons can travel about the times as fast as electrons . And while electrons square with one another , beams of square , which have no mass or charge, can cross through one another square beams electrons computer react photons xtra ecoming y y programs
- m=5 times 25 cdot 0^-3 mathrm(cr) v=ln 210^-3 mathrm(~h)^3 ( or ) 25600 mathrm(~m) / mathrm(c) p-?
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