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Questions tagged 'Thermodynamics'

55 questions

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Anonymous

Feb 20, 2025

first law of thermodynamics?

An egg is initially at rest and is dropped onto a concrete surface, resulting in its breakage. Treating the egg as a system, please address the following: a. What is the sign of work (W)? b. What is t...

How much heat is required to warm 1.70 kg of sand from 30.0 ∘C to 100.0 ∘C? The specific heat capacity of sand is Cs=0.84J/g⋅∘C.?

How much heat is required to raise the temperature of 1.70 kg of sand from 30.0 °C to 100.0 °C? The specific heat capacity of sand is given as Cs = 0.84 J/g·°C.

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Anonymous

Feb 18, 2025

Consider the following reaction. 2H2 + O2 —> 2H2O. Change of H(rxn) = -484kJ.?

Consider the following reaction: 2H₂ + O₂ → 2H₂O, with a change in enthalpy (ΔH) of -484 kJ. Which answer best describes the heat transfer that occurs when 1.5 moles of H₂ react? a. 726 kJ absorbed...

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Anonymous

Feb 16, 2025

Standard enthalpy of formation?

Given the following reactions and their standard enthalpy changes: H2 (g) + F2 (g) → 2HF (g) ΔH°rxn = -546.6 kJ 2H2 (g) + O2 (g) → 2H2O (l) ΔH°rxn = -571.6 kJ Calculate the standard enthalpy c...

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Anonymous

Feb 13, 2025

If this same quantity of energy were transferred to 2.5 kg of water at its boiling point, what fraction of the water would be vaporized?

"If this same quantity of energy were transferred to 2.5 kg of water at its boiling point, what fraction of the water would be vaporized? Quantitative Energy Problem: Energy Constants for Water (H2O):...

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Anonymous

Feb 08, 2025

a rigid tank whose volume is unknown is divided into two parts by a partition. THERMODYNAMICS HELP!!!!?

A rigid tank of unknown volume is divided into two parts by a partition. One side of the tank contains an ideal gas at a temperature of 927 degrees Celsius, while the other side is evacuated and has a...

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Anonymous

Feb 08, 2025

Heat can never flow from __________.?

Heat can never flow from which of the following options? a. Hot to cold b. Cold to hot c. Liquid to solid d. Solid to liquid

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Anonymous

Feb 07, 2025

Help with this one question please?

In this virtual lab, you will use coffee cup calorimetry to determine the specific heat (c) of a metal. 1) Imagine that in the lab, you record the mass of a piece of metal, denoted as m(metal) = 45.0...

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Anonymous

Feb 05, 2025

Carbon dioxide enters an adiabatic compressor at 100 kPa and 300 K at a rate of 0.5 kg/s and leaves at 600 kPa and 450 K. Neglecting

Carbon dioxide enters an adiabatic compressor at a pressure of 100 kPa and a temperature of 300 K, with a mass flow rate of 0.5 kg/s. It exits the compressor at a pressure of 600 kPa and a temperature...

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Anonymous

Feb 03, 2025

CHEMISTRY HELP PLEASE!!?

Title: Chemistry Help Needed Body: I am studying the decomposition of a metal oxide into its elements, represented by the following reaction: M2O (s) → 2M (s) + 1/2 O2 (g) The standard Gibbs energy c...