Solve Chemistry Problems: Methane, Oxygen, Carbon Dioxide, Water

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The forum discussion focuses on various chemistry problems involving reactions, enthalpy changes, and gas laws. Key calculations include the mass of water produced from the reaction of 3.2g of methane with 12.8g of oxygen, resulting in 8.8g of carbon dioxide. Additionally, the discussion addresses the enthalpy change for the sublimation of iodine and the enthalpy of formation for methane. Participants also explore the acidity of a solution formed by mixing hydrochloric acid with magnesium hydroxide and calculate the temperature of chlorine gas under specific conditions.

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  • Understanding of stoichiometry in chemical reactions
  • Knowledge of thermodynamics, specifically enthalpy changes
  • Familiarity with gas laws and calculations
  • Basic principles of acid-base chemistry
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  • Explore gas laws, particularly the Ideal Gas Law and its applications
  • Investigate acid-base reactions and pH calculations in solution chemistry
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Chemistry students, educators, and professionals involved in chemical research or education, particularly those focusing on reaction mechanisms, thermodynamics, and solution chemistry.

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1. Methane and oxygen react to form carbon dioxide and water. What mass of water if formed if 3.2g of methane reacts with 12.8g of oxygen to produce 8.8g of carbon dioxide?

2. For the reaction:
I2 (g)------> I2(s) , DeltaH degree = -62.4 kJ at 25 degree C. Based on the information given, what is the DeltaH degree vap or DeltaH degree sub at 25 degree C??

3. What is the smallest angle of SF6?

4. For the reaction:
2CH4 (g) + Cl2 (g)------->2CHCl3 (l) + 3H2(g)
DeltaH degree= -118.6kJ . DeltaH degree f= -134.1 kJ/mol for CHCl3 (l). Find DeltaH degree f for CH4 (g).

5. When 200ml if 0.150M of hydrochloric acid is added to 125 mL of 0.175 M mg(OH)2, the resulting solution will be: (acidic, basic, neutral)?

6. What is the Celsuis temperature of 100.0 g of chlorine gas in a 40.0 L container at 800mmHg?

7. Calculate the energy change in kJ/mol for the reaction:
Li+(g) + F-(g) ------> Li(g) + F(g) using the following information :
Li (g) ----> Li+(g) + e- +520 kJ/mol
F(g) + e----->F-(g) -328 kJ/mol
 
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