Questions tagged 'Thermodynamics'
55 questions
A 30-kg iron block and a 40-kg copper block, both initially at 808C, are dropped into a large lake at 158C. Thermal equilibrium is
A 30-kg iron block and a 40-kg copper block, both initially at 80°C, are dropped into a large lake with a temperature of 15°C. As a result of heat transfer between the blocks and the lake, thermal equ...
A 1.800-g sample of solid phenol (C6H5OH(s)) was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/?
A 1.800-g sample of solid phenol (C6H5OH(s)) was burned in a bomb calorimeter with a total heat capacity of 11.66 kJ/°C. The temperature of the calorimeter and its contents increased from 21.36 °C to...
How many kilograms of hot-water (70C) must be mixed with cold-water?
How many kilograms of hot water at 70°C must be mixed with cold water at 20°C to achieve a final temperature of 30°C? The total mass of the water mixture (hot and cold) is 200 kg. Please assume that n...
A heat pump is used to keep a house warm at 22 degrees?
A heat pump is used to maintain a house temperature of 22 degrees Celsius. a.) How much work is required from the pump to deliver 2500 J of heat into the house when the outdoor temperature is 0 degre...
Calculate the standard enthalpy?
Calculate the standard enthalpy change for the following reaction, assuming water (H2O) is produced in the gaseous state: CH3OH (l) + 1.5 O2 (g) → CO2 (g) + 2 H2O (g) Additionally, please calculate th...
Lighters are usually fueled by butane (C4H10). When 1 mole of butane burns at constant pressure it produces 2658kJ of heat and does 3kJ of w?
Lighters are typically fueled by butane (C4H10). When 1 mole of butane burns at constant pressure, it produces 2658 kJ of heat and does 3 kJ of work. What are the values of ΔH and ΔE for the combustio...
Calculate ΔH for formation of 0.480mol of AgCl by this reaction.?
Calculate ΔH for the formation of 0.480 mol of AgCl using the following reaction: Ag⁺(aq) + Cl⁻(aq) → AgCl(s) ΔH = -65.5 kJ. Please explain how to perform this calculation, and additionally, complete...
Select the delta H values associated with the dissolution of lithium chloride that are exothermic?
The chemical equation for the dissolution of lithium chloride is as follows: LiCl (s) → Li⁺ (aq) + Cl⁻ (aq) The delta H value for this process is 37.4 kJ/mol. Please select the delta H values assoc...
Which one has the larger standard entropy?
Which substance has the larger standard entropy? 1) 1 mol of P4(g) at 300°C and 0.01 atm versus 1 mol of As4(g) at 300°C and 0.01 atm. 2) 0.5 mol of N2(g) at 298 K in a 20 L volume versus 0.5 mol of...
Jan 04, 2025
2A+B⇌2C+2DΔH∘rxn =319 kJ For the reaction given, how much heat is absorbed when 2.60mol of A reacts?A-269B-425C183D-505?
For the equilibrium reaction represented by the equation (2A + B \rightleftharpoons 2C + 2D) with a standard reaction enthalpy of (\Delta H^\circ_{\text{rxn}} = 319 \, \text{kJ}), how much heat is abs...