Given the following reaction: h2(g)+i2(s) → 2hi(g) with a ∆hof 52. 9 kj. What is the change in enthalpy for the following reaction: hi(g) → 1 2h2(g)+ 1 2i2(s)? express your answer in kj.

All of the following are examples of service-learning opportunities except: a. donating time to senior citizen war veterans and writing a report about the experience for your u.s. history class. b. getting a part-time job at a habitat restoration center. c. reading to second-grade students as part of your assigned reading time for your english class. d. planting trees in your community and then discussing global warming in your science class.

Generally, investment philosophy is dividend into one category: conservative.

What percentage of the earth's water is available for use by living things?