When we expose a block of dry ice, solid carbon dioxide (CO2), to room temperature air, it changes from solid directly into gas.
Which is an accurate chemical equation (symbolic representation) for this change?
A) CO2 (s) -> C (g) + O2 (g)
B) CO2 (s) -> CO2 (g)
C) CO2 (s) -> C (g) + 2O (g)
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Which is an accurate chemical equation (symbolic representation) for this change?
q6
Choose the correct, balanced chemical equation for the following decomposition reaction: solid lithium carbonate decomposes with heat to form solid lithium oxide and carbon dioxide gas Li2CO3(s) bheatrxn Li2O(s) + CO2(g) • LiCO3(s) bheatrxn 2 LIO(s) + CO2(g) LICOz(s) wheatrxn Li(s) + CO2(g)
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Instructions: Write the word equations for the chemical equations below and determine th reaction (synthesis/combination, decomposition, single-displacement, double-displaceme combustion). 1. 2 H2O + 2H2 + O2 2. CH4(g) +2 02(g) → CO2(g) + 2 H20 3. HNO3 + NaHCO3 → NaNO3 + H2O + CO2 4. AgNO3 + CaCl2 → AgCl + Ca(NO3)2 5. 3 H2(g) + N2(g) → 2 NH3(g) 6. 2 H2O2 → 2 H2O + O2 QUESTION 1 What is the correct word equation for the following...
Your instructor gives you a 100 g of dry ice (solid carbon dioxide) at -100 °C. Through the course of an experiment, you end up with 100 g of gaseous carbon dioxide at 0 °C. Answer the following questions based on this data. Assume that no heat is lost to the outside environment during the experiment. The specific heats for solid and gaseous carbon dioxide are 0.296 and 0.203 cal/g-°C respectively. Remember, carbon dioxide sublimes from solid to gas at...
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1. Which of the following observations is/are examples of chemical change? 1. Sodium chloride melts at 801 °C. 2. The density of water decreases when it changes from a liquid to a solid. 3. The combustion of propane gas yields carbon dioxide and water.
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I do not understand #5
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Dry ice, CO2(s), is thermodynamically stable at temperatures below -78 °C. The sublimation of dry ice can be described by the following equation: CO2(s) = CO2(g) What are the signs for the enthalpy, entropy, and free energy change for the sublimation at room temperature? Justify your answer for each thermodynamic value.
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