Enthalpy definitions quiz wordsearch (OCR)

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

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 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 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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