Multiple Choice
How much would the temperature of 309 g of ethanol increase if 25.3 kJ of heat were added to it? The specific heat of ethanol is 2.42 J/g°C.
8. Thermochemistry
Heat Capacity
Back8. Thermochemistry
Heat Capacity
- Multiple ChoiceHow do you calculate the heat change when a solute with known mass is dissolved in water, considering its lattice energy and heat of hydration?
- Multiple ChoiceIf a hot metal with a mass of 5.21 grams undergoes a temperature decrease of 18.18 °C and releases 150 J of heat, what is the specific heat capacity of the metal?
- Multiple ChoiceSuppose that 0.44 g of water at 25 °C condenses on the surface of a 51-g block of aluminum that is initially at 25 °C. If the heat released during condensation goes only toward heating the metal, what is the final temperature (in °C)?
- Multiple ChoiceIn a process where 4.80 kg of boiling water is used to raise the temperature of 25.0 kg of water in a bath to body temperature, how much heat is transferred if the heat lost by the boiling water is equal to the heat gained by the room-temperature water?
- Multiple ChoiceWhat is the total heat required to convert 1 mole of C2Cl3F3 from liquid at 47.6 °C to gas at 47.6 °C, given the specific heats of C2Cl3F3(l) and C2Cl3F3(g) are 0.91 J g⁻¹ K⁻¹ and 0.67 J g⁻¹ K⁻¹, respectively, and the heat of vaporization is 27.49 kJ mol⁻¹?
- Multiple ChoiceThe heat capacity of a calorimeter was determined by adding 50.0 g of water at 45.0°C to the coffee cup calorimeter that contained 50.0 g of water at 20.0°C. The final temperature was measured to be 31.8°C. Calculate the heat capacity of the calorimeter (C_cal) in J/°C.
- Multiple ChoiceWhen calculating the heat of solution in a calorimeter, which of the following is assumed to be negligible?
- Multiple ChoiceThe specific heat of silver (Ag) is 0.245 J/°C g. Determine the energy required to raise the temperature of 350 g of Ag from 293 K to 400 K.
- Multiple ChoiceThe specific heat of water is 4.18 J/(g°C). Calculate the molar heat capacity of water in J/(mol°C).
- Multiple ChoiceWhat is the specific heat capacity of lead if it takes 98.0 J to raise the temperature of a 75.5 g block by 10.2 °C? Express your answer with the appropriate units.
- Multiple ChoiceWhich of the following substances (with specific heat capacity provided) would show the smallest temperature change upon gaining 200.0 J of heat?