Part A Enter an equation for the formation of HF(g) from its elements in their standard states. Express your answer as a chemical equation including phases. A chemical reaction does not occur for this question. Part C ΑΣΦ Complete previous part(s) Request Answer Enter an equation for the formation of SO₂ (g) from its elements in their standard states. Express your answer as a chemical equation including phases. Part E ΑΣΦ A chemical reaction does not occur for this question. Complete previous part(s) Request Answer Part G ? Enter an equation for the formation of Fe₂O₂ (s) from its elements in their standard states. Express your answer as a chemical equation including phases. == |ΑΣΦ- ^ Request Answer Complete previous part(s) A chemical reaction does not occur for this question ? ΑΣΦ ? an equa the formation of C₂H₂(g) om its elements in their standard states Express your answer as a chemical equation including phases. Request Answer ? A chemical reaction does not occur for this question.

2. A gas gains 15.0 kJ of heat and then performs 5.0 kJ of work. Calculate the AE of the gas.

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17. An ice cube is placed in a sealed insulated container of hot water at 80°C. After five minutes, the ice cube disappears. Ice Cube Heat ener Hot Water 5 min. Water Which best describes the change that took place inside the container? The total heat energy in the container was reduced by the ice cube. The hot water lost the same amount of heat energy as the ice cube gained. in the hot water was reduced by kinetic energy in the ice cube. O Heat energy in the ice cube was dissipated into the hot water.

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Use the References to access important values if needed for this question. When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. Thermometer Cardboard or In the laboratory a general chemistry student finds that when 14.72 g of BaBr2(s) are Styrofoam lid dissolved in 101.00 g of water, the temperature of the solution increases from 22.80 to 25.27 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.82 J/°C. Nested Styrofoam cups Based on the student's observation, calculate the enthalpy of dissolution of BaBr2(s) in kJ/mol. Reaction occurs in solution. Assume the specific heat of the solution is equal to the specific heat of water. AHdissolution = kJ/mol

What mass is equal to 24.3 mold of gold chloride (AuCl3) ? **Show all work

In order to break water into hydrogen and oxygen, water is heated to more than 500°C. Which kind of reaction is this and why? It is exothermic because heat needs to be released by the reactants to form the products. It is endothermic because heat needs to be released by the reactants to form the products It is exothermic because heat needs to be absorbed by the reactants to form the products. It is endothermic because heat needs to be absorbed by the reactants to form the products.