Chemistry Answers

ESSAY.

Water, compared to other substances, has one of the highest specific heat values. What is the advantage of this fact for the human body?

Direction: Solve the following problems. Attach your solutions.

1. Calculate the standard enthalpy change ΔH°, for the following reaction:

2CH3OH (l) + 3O2 (g) --> 2CO2 (g) + 2H2O (g)

Given: CH3OH (l) -------> ΔHf° = -238.7 kJ

CO2 (g) -------> ΔHf° = -393.5 kJ

H2O (l) -------> ΔHf° = -285.8 kJ

1.Calculate the enthalpy change for the following chemical reaction:

SC2(l) + 3O@(g) --> CO2(g) + 2SO2(g)

1.C(s) + O2(g) --> CO2(g) ΔH° = - 393.5 kJ

2.S(s) + O2(g) --> SO2(g) ΔH° = - 296.8 kJ

3.C(s) + 2S(s) --> CS2(l) ΔH° = + 87.9 kJ

a pot of cold water is heated on a stove, and when the water boils, a fresh egg is placed in the water to cook. describe the events that are occuring in terms of the zeroth law of thermodynamics.

How many moles are there in 8.25 x 1026 molecules of methane, CH4?

How many moles are there in 8.25 x 1026 molecules of methane, CH4?

Calculate the heat released when 68.0 gram of steam at 124⁰C is converted to water

    at 45⁰C