Chapter 3: Q.3.102 (page 94)

A 115-g sample of steam at $100^{o} C$ is emitted from a volcano. It condenses, cools, and falls as snow at $0^{o} C$ . How many kilojoules were released?

Short Answer

Expert verified

$346 k J$ were released

Step by step solution

Step 1: Introduction

Mass of steam released is $115 g$ and specific heat of water $c = 1.0 cal / g^{0} C$

After condensation of steam heat released is localid="1654282579212" $540 cal / g$

The heat of fusion of water after condensing is localid="1654282583440" $79.7 cal / g$

The heat released after condensation of steam =localid="1654282587786" $\frac{115 \times 540}{1000} = 62 k c a l$

The heat released after condensation of water =localid="1654282592134" $\frac{115 \times 79.9}{1000} = 9.17 k c a l$

Explanation

Temperate change $∆ T = 100^{o} C - 0^{o} C = 100^{o} C$

Heat released $Q = m c Δ T$

localid="1654282600172" $\Rightarrow \frac{115 \times 79.7}{1000} = 9.17 k c a l$

The total heat released from the steam is

localid="1654282618969" $= 62 kcal + 11.5 kcal + 9.17 kcal = 82.17 kcal = 82.17 \times 4.184 (1 k c a l = 4.184 J) = 346 k J$

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A 115-g sample of steam at $100^{o} C$ is emitted from a volcano. It condenses, cools, and falls as snow at $0^{o} C$ . How many kilojoules were released?

Short Answer

Step by step solution

Step 1: Introduction

Explanation

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A 115-g sample of steam at 100oCis emitted from a volcano. It condenses, cools, and falls as snow at 0oC. How many kilojoules were released?

Short Answer

Step by step solution

Step 1: Introduction

Explanation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Making Measurements

Nuclear Chemistry

Organic Chemistry

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Study anywhere. Anytime. Across all devices.

A 115-g sample of steam at $100^{o} C$ is emitted from a volcano. It condenses, cools, and falls as snow at $0^{o} C$ . How many kilojoules were released?