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What are the H-C-H bond angles in Ethane, Ethene, and Ethyne?

The molar heat of vaporization for water is 44.01 kj/mol at 298 K and 40.79 kj/mol at 373 K. Write a thermodynamic cycle explaining how you would calculate the value at 298 K. If you knew the value at 373 K and show what other data you would need to compute it. Give a qualitative explanation for the difference between these values

What is thermoplastic? 

Write a summary about the activity of jogging and how we benefit from jogging.