When you add water to a small amount of ammonium chloride (NH4CI), the solid dissolves and the solution becomes cold.  1. In what direction is thermal energy flowing between system and surroundings?  -A thermal energy is released by the system  b- Thermal energy is absorbed by the system  2. What is the sign of delta G for this process?  -negative  - positive  -zero

Define specific heat capacity. the quantity of heat required to raise the temperature of 1 mole of a substance by 1°C the quantity of heat required to change a system's temperature by 1°C the quantity of heat required to raise the temperature of 1 gram of a substance by 1°C the quantity of heat required to raise the temperature of 1 gram of a substance by 1°F the quantity of heat required to raise the temperature of 1 liter of a substance by 1°C

Exothermic Endothermic Heat Hotter than sUrOUndings Heat Heat /Cooler than surroundings Heat Heat Heat Which statement is correct? O When an exothermic process takes place in the system, the entropy of the surroundings does not change. O When an exothermic process takes place in the system, the entropy of the surroundings may increase or decrease. O When an exothermic process takes place in the system, the entropy of the surroundings decreases. O When an exothermic process takes place in the system, the entropy of the surroundings increases.

true of false

A chemical reaction takes place in an open flask. The reaction releases 355 kJ of heat and does 25 kJ of work on the surroundings. Is the reaction endothermic or exothermic? Calculate ΔH for the reaction. Calculate ΔU for the reaction.

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Please answer question 20 part A

Explain Enthalpy and Entropy ? Show the Difference between them ?

Carbon monoxide and nitrogen monoxide gases combine to form carbon dioxide and nitrogen gases according to the following balanced chemical equation: 2 CO (g) + 2NO(g) → 2 CO₂ (g) + N₂ (g) AG° rxn NO: 0.01440 atm CO₂: 2.439 atm N₂: 2.137 atm = -689.6 kJ What will be the Gibbs free energy change (AGxn) in kJ if the reaction occurs at 28.86 °C? (4 sf) The partial pressures of the gases are: CO: 0.02798 atm mo

A student dissolves 11.0 g of potassium hydroxide (KOH) in 200. g of water in a well-insulated open cup. He then observes the temperature of the water rise from 22.0 °C to 33.7 °C over the course of 8.5 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: КОН(:) K*(aq) + OH (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. O exothermic Is this reaction exothermic, endothermic, or neither? O endothermic O neither If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. I kJ Calculate…