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fgiga [73]
3 years ago
6

Which of these statements is true about heat. 1. Heat always flows from cooler to warmer substances. 2. Heat doesn’t flow betwee

n substances. 3. Heat always flows from warmer to cooler substances. 4. Heat flows when both substances have the same temperature.
Chemistry
2 answers:
Oksana_A [137]3 years ago
7 0
 heat flows<span> from the </span>warmer<span> body to the </span>cooler<span> body </span>
elena55 [62]3 years ago
4 0

Answer: Option (3) is the correct answer.

Explanation:

The statement heat always flows from warmer to cooler substances is true.

When a hot substance is placed in contact with a cooler substance then exchange of heat takes place from warmer to cooler substance until thermal equilibrium is reached.

The molecules of warmer substance collide rapidly with each other. When a cooler substance is placed in touch with it then the molecules of warmer substance starts to collide with the molecules of cooler substance.

As a result, the molecules of cooler substance also gain energy. Hence, there will be exchange of energy from warmer substance to cooler substance.

This exchange of energy will continue till the temperature of both warmer and cooler substance becomes equal. After that there will be no exchange of heat.

Therefore, we can conclude that heat always flows from warmer to cooler substances.

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What is the oxidation number of tin (Sn) in the compound Na2SnO2? A. -2 B. 0 C. +2 D. +3
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3 years ago
Read 2 more answers
if 11.74 liters of gas at STP are pumped into a basketball, how many moles of gas are in the basketball? assume the basketball w
ser-zykov [4K]

Answer:

0.52 mol

Explanation:

Using the general gas equation formula:

PV = nRT

Where;

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V = volume (Liters)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

At STP (standard temperature and pressure), temperature of a gas is 273K, while its pressure is 1 atm

Using PV = nRT

n = PV/RT

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