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Chemistry

2 answers:

Butoxors [25]3 years ago

5 0

Conduction

Putting an ice pack on an injury

Burning yourself by touching boiling water

Grabbing a warm coffee mug to warm your hands

The handle of a pot becoming too hot to grab as it cooks on the stove

Convection

Warm air rising off of the pavement

An oven that cooks by cycling warm air through the bottom and out the top

Warm water rising to the surface of the ocean and cooler water sinking

Radiation

Heat from a fire warming your hands

Heat from the sun hitting a solar panel

Cooking popcorn using a microwave

valkas [14]3 years ago

3 0

Conduction
2
4
7

Convection
1
8
9
10

Radiation
3
5
6

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determine the final temperature of a gold nugget parentheses Mass equals 376 G parentheses that starts at 398k and loses 4.85 KJ

maw [93]

Answer:

297.23 K

Explanation:

Given that:

the mass of the gold nugget (m) = 376 g

the initial temperature $T_1$ = 398 K

amount of heat lost Q = -4.85 kJ = -4.85 × 10³

specific heat capacity (c) = 0.128 J/g° C

Using the formula for calculating the Heat energy

$Q = mc\Delta T \\ \\ Q = m\times c\times (T_2-T_1)$

$-4.85 \times 10^3 = 376 \times 0.128 \times (T_2 - 398) \\ \\ -4.85\times 10^3 = 48.128(T_2 - 398) \\ \\ \dfrac{-4.85\times 10^3}{48.128}= (T_2 - 398) \\ \\-100.77 = T_2 -398\\\\T_2 = -398 +100.77\\ \\ \mathbf{ T_2 = 297.23K}$