Enthalpy change

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

Clues

  • A pressure of 100kPa, temperature of 298K or 25C and the substance in the reaction is in normal physical state (8, 10)
  • Energy exchange between a chemical reaction and its surroundings at constant pressure (8, 6)
  • The energy needed to break 1 mole of a particular bond in 1 mole of gaseous molecule at standard condition (4, 6)
  • The total enthalpy change in a chemical reaction is independent of the route by which the chemical reaction takes place as long as the initial and final conditions are the same (5, 3)

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