Enthalpy definitions quiz wordsearch (OCR)

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

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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