Enthalpy definitions quiz wordsearch (OCR)

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

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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