Enthalpy definitions quiz wordsearch (OCR)

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

Clues

  • An example of an endothermic reaction. (think of plants). (14)
  • An example of an exothermic reaction. (think of animals). (11)
  • 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 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 heat content that is stored in a chemical system ? (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 name of a reaction whereby the enthalpy of the products is smaller than the enthalpy of the reactants ? (this causes heat to be lost to its surroundings). (10)
  • 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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