An unknown mass of each of the following substances, initially at 21.0 ∘C, absorbs 1930 J...

An unknown mass of each of the following substances, initially at 21.0 ∘C, absorbs 1930 J of heat. The final temperature is recorded as indicated. Find the mass of each substance.

1) Pyrex glass (Tf= 55.7 ∘C)

2) sand (Tf= 62.3 ∘C)

3) ethanol (Tf= 44.4 ∘C)

4) water (Tf= 32.4 ∘C)

Expert Solution

queen_honey_blossom answered 1 year ago

An unknown mass of each substance, initially at 25.0 ∘C, absorbs 1930 J of heat. The...

An unknown mass of each substance, initially at 25.0 ∘C, absorbs 1930 J of heat. The final temperature is recorded. Find the mass of each substance. a. Pyrex glass (Tf= 55.6 ∘C) sand (Tf= 62.1 ∘C) ethanol (Tf= 44.3 ∘C) water (Tf= 32.3 ∘C)

Suppose that 24 g of each of the following substances is initially at 29.0 ∘C. What...

Suppose that 24 g of each of the following substances is initially at 29.0 ∘C. What is the final temperature of each substance upon absorbing 2.45 kJ of heat? silver gold aluminum water

Based on the following table, determine what each of the unknown substances are from the following...

Based on the following table, determine what each of the unknown substances are from the following list. Unknown Possibilities glycine calcium carbonate aluminum iron (III) oxide adipic acid dodecyl alcohol iron silicon sodium carbonate potassium nitrate salicylic acid graphite Sample Appearence H2O Soluble? Hexane Soluble? Ethyl Alcohol Soluble? Melting Point Conductivity in solid Conductivity in aqueous pH Rxn in HCl? Rxn in NaOH? #4 Clear Crystals Insoluble Soluble Soluble <100 No No 6 No Rxn No Rxn #8 Black Powder ...

An unknown mass of water (m1) of temperature 3.4°C is mixed with another unknown mass of...

An unknown mass of water (m1) of temperature 3.4°C is mixed with another unknown mass of water (m2) of 55.6°C. The combined mixture of water (m3) has a temperature of 26.1°C and a mass of 154 grams. Determine the mass of (m1) and (m2) WITHOUT using cwater= 4184 J/kg°C.

Give the formula and calculate the molar mass for each of the following substances. ammonium sulfide...

Give the formula and calculate the molar mass for each of the following substances. ammonium sulfide dichlorophenol, C6H4OCl2 barium hydride potassium dihydrogen phosphate

8-12)A heat engine operates in a Carnot cycle between 84.0°C and 355°C. It absorbs 21,600 J...

8-12)A heat engine operates in a Carnot cycle between 84.0°C and 355°C. It absorbs 21,600 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s. (a) What is the mechanical power output of this engine? kW (b) How much energy does it expel in each cycle by heat? kJ 12)A Carnot engine operates between 105°C and 18°C. How much ice can the engine melt from its exhaust after it has done 4.0 ✕...

(a) Consider the following two stage process: Stage 1. The system absorbs 83 J of...

(a) Consider the following two stage process: Stage 1. The system absorbs 83 J of heat and during this process it had 44 J of work done on it. Stage 2. The system absorbs 63 J of heat and during this process it does 27 J of work on the surroundings. Calculate Q, w, and ΔE for the overall process (b) A piston is compressed from a volume of 7.5 L to 2.2 L at a constant...

A capacitor of unknown capacitance C is charged to 130 V and connected across an initially...

A capacitor of unknown capacitance C is charged to 130 V and connected across an initially uncharged 75 uF capacitor. if the final potential difference across the 75 uF capacitor is 47 V what is C? After you find the value of C, you charge this capacitor C to a potential difference V=140 V between its plates. The charging battery is now disconnected and a slab material ( k=7.20 is slipped between the plates. what is the potential energy of...

A 31.87 g sample of a substance is initially at 28.5 °C. After absorbing 1697 J...

A 31.87 g sample of a substance is initially at 28.5 °C. After absorbing 1697 J of heat, the temperature of the substance is 140.5 °C. What is the specific heat (c) of the substance?

Two copper blocks, each of mass 1.96 kg, initially have different temperatures,t1 = 17° C and...

Two copper blocks, each of mass 1.96 kg, initially have different temperatures,t1 = 17° C and t2 = 27° C. The blocks are placed in contact with each other and come to thermal equilibrium. No heat is lost to the surroundings. (a) Find the final temperature of the blocks. °C Find the heat transferred between them. J (b) Find the entropy change of each block during the time interval in which the first joule of heat flows. ΔS1 = J/K ΔS2...

Question