Enthalpy definitions quiz wordsearch (OCR)

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

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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