Enthalpy definitions quiz wordsearch (OCR)

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I B G K U A O S S M Y T B Q Q H V F C A Y
B I P U J J U P N E P W L S R O H N U P J
Y X O G H X K E O G L I O P K T L C T G V
G V M S C R Y C I P A C D H N S E W A F J
R Y T F V B N I T E H N Q O L W S E G A F
E P R V S B E F I L T F J T Q D A C S A L
N L E Q V P T I D C N L N O M C X I G S U
E A S F K G A C N Y E P W S J U A M V R X
N H P N W J T H O C D O V Y S P N R B B B
O T I J B C S E C Y N Q H N R R U E W D I
I N R O J G D A D P O I A T B L B H R N D
T E A L V A R T R L B R M H O S K T U A W
A D T R L V A C A A E Y W E I V C O U N U
V N I Q N A D A D H G V I S S W X D L H M
I O O L O B N P N T A I Q I R R G N K L X
T B N T E E A A A N R G G S Y V D E D B I
C U H H X T T C T E E D G Y T F K T U X I
A U T J K L S I S U V I H M Q V X I V K O
U Y V K P M J T K B A R H P I S I Y T K U
O J S M F Q A Y A B B G R L I N V R F O D
T U E M R E O T I D J F W S K R U U I W H

Clues

  • An example of an endothermic reaction. (think of plants). (14)
  • An example of an exothermic reaction. (think of animals). (11)
  • What are: a pressure of 100 kPa, a stated temperature 298 K or (25 degrees celsius) and a concentration of 1.0 mol per dm cubed classed as ? (8, 10)
  • What is a diagram showing alternate routes between reactants and products which allows the indirect determintation of an enthalpy change from other known enthalpy changes using Hess' law. (8, 5)
  • What is the average enthalpy change that takes place when breaking by homolytic fission 1 mol of a given bond in the molecule of a given species. (7, 4, 8)
  • What is the energy required to raise the temperature of 1g of a substance by 1 degree celsius. (8, 4, 8)
  • What is the enthalpy change that takes place when breaking by homolytic fission 1 mol of a given bond in the molecules of a gaseous species. (4, 8)
  • What is the minimum energy required to start a reaction by the breaking of bonds. (10, 6)
  • What is the name of a reaction whereby the enthalpy of the products is larger than the enthalpy of the reactants ? (this causes heat to be taken in from its surroundings). (11)
  • What is the physical state of a substance under the standard conditions of 100 kPa (1 atmosphere) and 298 K (25 degrees celsius). (8, 5)

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