Domanda del libro di testo
(a) What amount of heat (in joules) is required to raise the temperature of 1 g of water by 1 kelvin? (b) What amount of heat (in joules) is required to raise the temperature of 1 mole of water by 1 kelvin?
Ch.5 - Thermochemistry
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 5, Problema 51c
(c) What is the heat capacity of 185 g of liquid water?
Guida verificata passo dopo passo1
Identify the specific heat capacity of liquid water, which is typically 4.18 J/g°C.
Use the formula for heat capacity: \( C = m \cdot c \), where \( C \) is the heat capacity, \( m \) is the mass, and \( c \) is the specific heat capacity.
Substitute the given mass of water (185 g) and the specific heat capacity (4.18 J/g°C) into the formula.
Calculate the product of the mass and the specific heat capacity to find the heat capacity.
Ensure the units are consistent and the final answer is in Joules per degree Celsius (J/°C).
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Heat Capacity
Heat capacity is the amount of heat energy required to raise the temperature of a substance by one degree Celsius. It is an extensive property, meaning it depends on the amount of substance present. For water, the specific heat capacity is typically 4.18 J/g°C, indicating that it takes 4.18 joules of energy to raise the temperature of one gram of water by one degree Celsius.
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02:19
Heat Capacity
Specific Heat Capacity
Specific heat capacity is a measure of how much heat energy is needed to change the temperature of a unit mass of a substance by one degree Celsius. It is expressed in units of J/g°C. Water has a high specific heat capacity, which means it can absorb a lot of heat without a significant change in temperature, making it an excellent coolant and temperature stabilizer in various environments.
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02:19Heat Capacity
Calculating Heat Capacity
To calculate the heat capacity of a given mass of a substance, you multiply the mass of the substance by its specific heat capacity. For example, to find the heat capacity of 185 g of water, you would use the formula: Heat Capacity = mass × specific heat capacity. This calculation provides insight into how much energy is needed to change the temperature of the water, which is crucial in thermodynamic processes.
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Two solid objects, A and B, are placed in boiling water and allowed to come to the temperature of the water. Each is then lifted out and placed in separate beakers containing 1000 g of water at 10.0 °C. Object A increases the water temperature by 3.50 °C; B increases the water temperature by 2.60 °C. (b) What can you say about the specific heats of A and B?
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Two solid objects, A and B, are placed in boiling water and allowed to come to the temperature of the water. Each is then lifted out and placed in separate beakers containing 1000 g of water at 10.0 °C. Object A increases the water temperature by 3.50 °C; B increases the water temperature by 2.60 °C. (a) Which object has the larger heat capacity?
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(d) How many kJ of heat are needed to raise the temperature of 5.00 kg of liquid water from 24.6 to 46.2 °C?
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(b) Calculate the energy needed for this temperature change.
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