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Here are some examples of Hess's Law practice problems:
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Calculate the enthalpy change for the reaction: 2H2(g) O2(g) - 2H2O(l) using the following information: H2(g) 1/2O2(g) - H2O(l) H -286 kJ/mol H2(g) 1/2O2(g) - H2O2(l) H -196 kJ/mol
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Determine the enthalpy change for the reaction: 2C(s) 3H2(g) - C2H6(g) given the following data: C(s) O2(g) - CO2(g) H -393.5 kJ/mol H2(g) 1/2O2(g) - H2O(l) H -285.8 kJ/mol C2H6(g) 7/2O2(g) - 2CO2(g) 3H2O(l) H -1560 kJ/mol
These examples involve using Hess's Law to manipulate and combine given reactions to determine the overall enthalpy change for a desired reaction.
What else can I help you with?
How are hesss and wegneners theory relate?
Hess's and Wegener's theories are interconnected in their exploration of continental movement and plate tectonics. Alfred Wegener proposed the theory of continental drift, suggesting that continents were once joined and have since moved apart. Harry Hess later contributed to this understanding with his theory of seafloor spreading, which explained how new oceanic crust forms at mid-ocean ridges and pushes continents apart. Together, their ideas laid the foundation for the modern understanding of plate tectonics.
Which was not included in the support for Harry Hesss hypothesis of sea-floor spreading?
One key piece of evidence not included in support of Harry Hess's hypothesis of sea-floor spreading was the discovery of paleomagnetic data. While Hess's theory focused on the creation of new oceanic crust at mid-ocean ridges and the recycling of crust at subduction zones, the paleomagnetic records provided insights into the historical movement of continents and the magnetic orientation of rocks, which later supported the theory of plate tectonics. Other evidence, such as the age of oceanic crust and the distribution of fossils, played a more direct role in supporting his hypothesis.
