Which unit is commonly used for enthalpy change?

Which process converts electrical energy into chemical energy?

Ibrahim is learning about oxidation states of polyatomic ions. He understands that the sum of oxidation states equals the ion's charge. In the carbonate ion (CO3^2-), what is the oxidation state of carbon if oxygen is -2?

Vera is studying oxidation states. She learns that the oxidation state of fluorine is always -1 in all its compounds. What is the oxidation state of fluorine in F2?

Julia is studying exothermic reactions. She knows that neutralization reactions are exothermic. What is observed when an acid reacts with a base?

Which cell is used in electroplating?

Which component maintains electrical neutrality in a voltaic cell?

In an endothermic reaction, ΔH is:

Which metal is commonly used for sacrificial protection of iron?

Laura is studying the prevention of corrosion. She learns that painting is a common method. Which of the following is an advantage of using paint for corrosion prevention?

Victor is studying the energy changes in chemical reactions. He knows that the enthalpy change is a state function. What does this mean?

Rachel is studying the system and surroundings. She knows that in an endothermic reaction, heat is absorbed from the surroundings. What happens to the temperature of the surroundings?

Julia is studying the prevention of corrosion by coating with a thin layer of another metal. She learns that tinning is used to coat steel with tin. What is the main application of tinned steel?

Mohamed is learning about corrosion. He understands that corrosion can be prevented by cathodic protection. Which of the following structures commonly uses cathodic protection?

Diana is learning about electroplating. She understands that electroplating can be used to coat a metal with a thin layer of another metal. Which of the following is a reason for electroplating?

Tina is studying the difference between bond formation and bond breaking. She knows that bond formation is exothermic and bond breaking is endothermic. What is the overall energy change when both processes occur?

Calorimetry is the study of:

Which reaction absorbs heat from surroundings?

David is studying redox reactions in terms of transfer of oxygen. He learns that oxidation involves gain of oxygen while reduction involves loss of oxygen. In the reaction: 2Mg + O2 → 2MgO, which substance is reduced?

Energy stored in chemicals is called:

What is the heat of reaction?

Aisha is studying oxidation states of polyatomic ions. She learns that the sum of oxidation states in an ion equals the ion's charge. In the nitrate ion (NO3^-), what is the oxidation state of nitrogen if oxygen is -2?

Activation energy is highest at:

Uma is studying the role of catalysts in industrial processes. She knows that catalysts are used in the Haber process and contact process. What is the catalyst used in the contact process for making sulfuric acid?

Khalid is comparing aerobic and anaerobic respiration. He knows that anaerobic respiration occurs in the absence of oxygen. What is a common product of anaerobic respiration in muscles?

Calorimeter is used to measure:

The electrolyte in an electrochemical cell is:

Xia is studying corrosion and its prevention. She learns that corrosion can be prevented by making the metal the cathode. What is this method called?

Yara is learning about the formula of ionic compounds. She knows that polyatomic ions can be included in the formula. What is the formula of the ionic compound formed between ammonium (NH4+) and carbonate (CO3^2-)?

Which energy change is shown by ΔH < 0?